Yazar "Acarli, Sefa" seçeneğine göre listele
Listeleniyor 1 - 20 / 32
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe A Preliminary Survey on Settlement and Recruitment Patterns of Mediterranean Mussel (Mytilus galloprovincialis) in Dardanelles, Turkey(Kafkas Univ, Veteriner Fakultesi Dergisi, 2010) Yildiz, Harun; Lok, Aynur; Acarli, Sefa; Serdar, Serpil; Kose, AysunIn this study, the settlement and growth of the Mediterranean mussel, Mytilus galloprovincialis, was monitored from September 2002 to February 2004 in Kilya Bay, Dardanelles. Water temperature ranged between 8.3-25 degrees C, the average chlorophyll-a was 0.70 mu gL(-1). The mussel abundances on the ropes in Kilya Bay, indicated the highest density of mussels in November 2002 (14184 ind. 0.25 m(-1)) and March 2003 (15485 ind. 0.25 m(-1)) and lowest in February 2004 (3713 ind. 0.25 m(-1)). Settlement was significantly different between samplings (P<0.05). At the end of 18 months. 91.36% of spat on rope was smaller than 2.8 mm. The highest percentage of length class was 1.5-2.79 mm with 40.26%. Even though mussel size reached a maximum of 55.7 mm, their density was very low, 0.20%.Öğe Annual Reproductive Cycle and Meat Yield of the Wedge Clam Donax trunculus Linnaeus, 1758 from Black Sea(Springer Int Publ Ag, 2024) Yildiz, Harun; Acarli, Sefa; Vural, Pervin; Gunduz, FettahThe study aims to determine the reproductive cycle, the condition index, meat yield, shell component index, shell thickness index and gonad index of bivalve Donax trunculus inhabiting the Kefken-Babal & imath; location on the Black Sea in relation to environmental parameters between November 2013 and October 2014. Its gonadal development began in November. D. trunculus was in the inactive stage during autumn. Spawning was observed from May (18 degrees C) to August (28 degrees C). Sex ratios were not equal and number of males was higher during the study period (1.13:1) with one hermaphrodite individual only. Being synchronous between sexes based on histological analysis, the reproductive cycle consists of six stages. The study showed that the most ideal period to harvest of D. trunculus was between December and May, especially when the meat yield and condition index were determined to be highest.Öğe Antioxidant radical scavenging capacity and total carotenoid content of narrow-clawed crayfish (Pontastacus leptodactylus, Eschscholtz, 1823) in Atikhisar Reservoir (Çanakkale, Türkiye)(Walter De Gruyter Gmbh, 2023) Acarli, Sefa; Kizilkaya, Bayram; Vural, Pervin; Berber, Selcuk; Kale, Semih; Acarli, DenizIn this study, antioxidant radical scavenging capacity and total carotenoid content in the meat and shells of Pontastacus leptodactylus were investigated. Concerning the antioxidant scavenging effect, the highest IC50 values were found to be 388.77 mg g(-1) and 155.53 mg g(-1) for females and males in July and March, respectively. The mean IC50 values of the meat were calculated as 239.83 mg g(-1) and 105.21 mg g(-1) for females and males, respectively. The mean total carotenoid content in the meat was found to be 14.35 and 12.78 mu g g(-1) for females and males, respectively. The results indicated that crayfish meat had antioxidant radical scavenging capacity and was rich in carotenoid content.Öğe Association between the Crab, Nepinnotheres pinnotheres (Linnaeus, 1758), and the Endangered Species Fan Mussel, Pinna nobilis (Linnaeus, 1758), from the Aegean Sea, Turkey(Adem Yavuz Sonmez, 2019) Acarli, Sefa; Vural, Pervin; Oktener, AhmetPinna nobilis, commonly known as the fan mussel or pen shell, is an endemic species in the Mediterranean Sea. The fan mussel population has recently been significantly endangered along the Mediterranean coast, mainly due to diseases. However, it has a critical role in the ecological system of the throughout the coasts of the Mediterranean. Therefore, it is important to investigate the interactions between P. nobilis and their enemies, parasites, symbiont in the ecological environment. Pea crabs are small crustacean and symbionts in a variety of invertebrates. They inhabit the mantle cavities of bivalve. The association between the pea crab, Nepinnotheres pinnotheres ( Decapoda), and P. nobilis (Bivalvia) from the Aegean Sea, Turkey was examined in this study. The crab samples were collected off Urla Karantina Island, Izmir Bay, Aegean Sea. The biometric characteristics of bivalve and crab in this coexistence were analyzed. 80% of P. nobilis was occupied by N. pinnotheres. The weight of pea crabs was recorded between 0.01 g and 3.87 g.Öğe Comparative Growth, Survival and Condition Index of Flat Oyster, Ostrea edulis (Linnaeus 1758) in Mersin Bay, Aegean Sea, Turkey(Kafkas Univ, Veteriner Fakultesi Dergisi, 2011) Acarli, Sefa; Lok, Aynur; Kucukdermenci, Aysun; Yildiz, Harun; Serdar, SerpilGrowth and survival of flat oyster, Ostrea edulis, juveniles of different sizes (15 mm, 20 mm, 25 mm, 30 mm, 35 mm and 40 mm) from natural spatfall were studied in suspended culture in Mersin Bay Izmir, Turkey from April 2002 to August 2003. Environmental parameters such as temperature, salinity, chlorophyll-a, total particulate matter (TPM), pH were monitored each sampling time. Temperature was between 13.8 degrees C (December 2002) and 24.5 degrees C (July and August 2002). Average chlorophyll-a, TPM and pH were 1.7 +/- 0.64 mu g l(-1), 0.01311+/-0.00224 mg l(-1) and 7.65+/-0.22, respectively. Shell length increment for each size groups (from small to large) was determined as 49.99, 43.39, 39.10, 33.11, 39.36 and 25.67 mm, respectively. The smallest group was growth faster than others (P < 0.05). Significant differences in survival rates between size groups occurred (highest: 60% for 15.mm and lowest: 12.8% for 35 mm) (P < 0.05). Condition index and meat yield which showed many variations throughout the study changed from 2.65% to 5.11% and from 6.65% to 12%, respectively.Öğe Comparative growth, survival and condition index of flat oyster, Ostrea edulis (Linnaeus 1758) in Mersin Bay, Aegean Sea, Turkey(Veteriner Fakultesi Dergisi, 2011) Acarli, Sefa; Lok, Aynur; Küçükdermenci, Aysun; Yildiz, Harun; Serdar, SerpilGrowth and survival of flat oyster, Ostrea edulis, juveniles of different sizes (15 mm, 20 mm, 25 mm, 30 mm, 35 mm and 40 mm) from natural spatfall were studied in suspended culture in Mersin Bay Izmir, Turkey from April 2002 to August 2003. Environmental parameters such as temperature, salinity, chlorophyll-a, total particulate matter (TPM), pH were monitored each sampling time. Temperature was between 13.8°C (December 2002) and 24.5°C (July and August 2002). Average chlorophyll-a, TPM and pH were 1.7±0.64 ?g l-1, 0.01311±0.00224 mg l-1 and 7.65±0.22, respectively. Shell length increment for each size groups (from small to large) was determined as 49.99, 43.39, 39.10, 33.11, 39.36 and 25.67 mm, respectively. The smallest group was growth faster than others (P<0.05). Significant differences in survival rates between size groups occurred (highest: 60% for 15.mm and lowest: 12.8% for 35 mm) (P<0.05). Condition index and meat yield which showed many variations throughout the study changed from 2.65% to 5.11% and from 6.65% to 12%, respectively.Öğe Comparative study on biochemical composition of some edible marine molluscs at Canakkale coasts, Turkey(Natl Inst Science Communication-Niscair, 2014) Celik, MeryemYesim; Culha, Saniye Turk; Culha, Mehmet; Yildiz, Harun; Acarli, Sefa; Celik, Ihson; Celik, PainarPresent study was carried out, at Dardanelles and the Marmara Sea coasts during March 2011 to February 2012. Ostrea edulis, Mytilus gallopro, Ruditapes decussa, Ruditapes pheleppirnarum and Rapona venosa were collected seasonally along with temperature and salinity. Biochemical composition of molluscs (protein, lipid, carbohydrate, moisture and ash) was examined from the samples. Seasonal values of protein, lipid, carbohydrate, ash and moisture were mean 64.71 +/- 1.31%, 1.86 +/- 0.10%, 24.09 +/- 1.33%, 9.35 +/- 0.26% and 67.51 +/- 1.47% in R.venosa; 55.88 +/- 2.04%, 5.60 +/- 0.19%, 23.43 +/- 1.59%, 15.10 +/- 0.67% and 83.28 +/- 0.86% inR. philipinarium; 56.27 +/- 1.98%, 5.82 +/- 0.34%, 23.39 +/- 1.62%, 14.53 +/- 0.66% and 83.58 +/- 0.59% in R. decussatus; 54.03 +/- 2.82%, 10.52 +/- 1.22%, 22.84 +/- 4.33%, 12.61 +/- 2.54% and 82.45 +/- 1.70% in M. galloprovincialis; 48.11 +/- 3.04%, 8.81 +/- 0.65%, 29.16 +/- 4.62%, 13.92 +/- 1.89% and 82.25 +/- 2.66% in O. edulis, respectively. Consequently, the sampled mollusc species has high protein (40.19 - 67.38 %) and low lipid (1.65 - 12.86 %). Overall, R. venosa appears to be best as diet with relatively high protein and low lipid among other examined molluscs.Öğe Comparison of Isochrysis galbana and Chlorella sp microalgae on growth and survival rate of European flat oyster (Ostrea edulis, Linnaeus 1758) larvae(Natl Inst Science Communication-Niscair, 2011) Acarli, Sefa; Lok, AynurInfluence of microalgal feeding with Isochrysis galbana and Chlorella sp. on the growth and survival rate of larvae of European flat oyster, Ostrea edulis, was investigated. Larvae were reared with four food regimes: I. galbana, Chlorella sp., mixture of both and unfed for 16 days. After 16 days, it was observed that the larvae reached the umbo stage with a mean size in length 220 +/- 4.12 mu m and 219 +/- 5.76 mu m (initial length, 159 mu m) (P>0.05). Larvae were fed on I. galbana and mixture diet. At this stage, survival rate was 30% and 24%, respectively (P>0.05). Growth and survival rates for the feeding regimes were significantly higher than the Chlorella sp. and unfed groups (P<0.05).Öğe Culture of Fan Mussel (Pinna nobilis, Linnaeus 1758) in Relation to Size on Suspended Culture System in Izmir Bay, Aegean Sea, Turkey(Kafkas Univ, Veteriner Fakultesi Dergisi, 2011) Acarli, Sefa; Lok, Aynur; Yigitkurt, Selcuk; Palaz, MustafaThe growth and survival of fan mussel (Pinna nobilis, Linnaeus) juveniles, from natural spatfall, were compared in two groups (large and small size) in Karantina Island Izmir, Turkey, between December 2004 and April 2006. Total live weight, shell length, width and thickness of fan mussel were measured monthly during the study period. Small (32 mm) and large (73 mm) size groups of fan mussel individuals reached 140.25 +/- 10.46 mm and 154.36 +/- 16.12 mm in length and 64.64 +/- 17.98 g and 99.74 +/- 30.53 g in live weight, respectively. Significant differences were found in increases of shell length and live weight. Environmental parameters such as chlorophyll-a, seawater temperature, salinity, particulate organic matter (POM) and particulate inorganic matter (PIM) were determined during each sampling period. Shell length increase was affected by chlorophyll-a and PIM. However, increases in shell length did not correlate with temperature and POM. Survival rates for small and large groups were 93% and 100%, respectively.Öğe Culture of fan mussel (pinna nobilis, linnaeus 1758) in relation to size on suspended culture system in izmir bay, aegean sea, Turkey(Veteriner Fakultesi Dergisi, 2011) Acarli, Sefa; Lok, Aynur; Yigitkurt, Selcuk; Palaz, MustafaThe growth and survival of fan mussel (Pinna nobilis, Linnaeus) juveniles, from natural spatfall, were compared in two groups (large and small size) in Karantina Island Izmir, Turkey, between December 2004 and April 2006. Total live weight, shell length, width and thickness of fan mussel were measured monthly during the study period. Small (32 mm) and large (73 mm) size groups of fan mussel individuals reached 140.25±10.46 mm and 154.36±16.12 mm in length and 64.64±17.98 g and 99.74±30.53 g in live weight, respectively. Significant differences were found in increases of shell length and live weight. Environmental parameters such as chlorophyll-a, seawater temperature, salinity, particulate organic matter (POM) and particulate inorganic matter (PIM) were determined during each sampling period. Shell length increase was affected by chlorophyll-a and PIM. However, increases in shell length did not correlate with temperature and POM. Survival rates for small and large groups were 93% and 100%, respectively.Öğe Distribution of the critically endangered fan mussel Pinna nobilis population in the Canakkale Strait and Marmara Sea(Ege Univ, Fac Fisheries, 2024) Acarli, Sefa; Acarli, Deniz; Kale, SemihThis study was conducted with the primary objective of determining the presence of both healthy and impacted Pinna nobilis populations along the European coasts of the Sea of Marmara, followed by the identification of P. nobilis abundance and survival rates in the region encompassing the Canakkale Strait and the southern coasts of the Sea of Marmara. Underwater surveys were randomly conducted at 19 distinct stations, including 8 stations along the European coasts of the Sea of Marmara, 7 stations along the southern coasts of the Sea of Marmara, and 6 stations within the Canakkale Strait. SCUBA diving equipment was utilized to record information on habitat structure, water temperature, depth, and visibility at each station. The transect length during underwater surveys and the number of transects at each station were determined based on the condition of the seabed and the size of the area, respectively. Throughout the study period (September 2021 and October 2023), water temperature fluctuated between 17.5 degrees C and 26.6 degrees C. At the end of the study, a total of 395 individuals (147 live, 248 dead) were observed, with live individuals exhibiting total lengths ranging from 16.4 cm to 50.9 cm. This study represents the first investigation into the spatial distribution of P. nobilis along the European coast of the Marmara Sea. The study contributes significantly to enhancing our understanding of the ecology of P. nobilis populations in both the Sea of Marmara and the Canakkale Strait. Additionally, recommendations for the rehabilitation of impacted populations and the conservation of healthy populations have been provided for decision-makers and fisheries managers.Öğe Estimation growth parameters of endangered the fan mussel species (Pinna Nobilis L.) by using different growth models from Izmir Bay, Aegean Sea, Turkey(Parlar Scientific Publications, 2019) Demirci, Aydin; Acarli, SefaThe study was carried out at Karantina Island located on the west side of Izmir Bay, Aegean Sea, Turkey. The fan mussel spats were cultured on the single long line system. Shell length and total weight of spats were measured monthly from December 2004 to April 2006. In total, 590 the fan mussels were sampled, 466 of which were obtained from collectors and others were collected by diving. Age-related length and weight growth factors of the fan mussel evaluated with four different model. The RSS values of all estimates were highly reliable; length and age values were significantly higher than weight. Von Bertalanffy's growth parameters showed that the fan mussel has a slowly growing species. The maximum estimated length size obtained with bivalves was 78.58 cm, growth performance index or phi-SULPH WHVW (?) ZDV 3.33 IRU,]PLU Bay. According to this study also Richards and the Logic model can be found in older ages (>7 years) to be more appropriate. However, von Bertalanffy was more suitable for the older of fan mussel. As the age increases, growth decreases and even rest are expected, but the fan mussel individuals may have agerelated weight gain. © 2019 Parlar Scientific Publications. All rights reserved.Öğe ESTIMATION GROWTH PARAMETERS OF ENDANGERED THE FAN MUSSEL SPECIES (PINNA NOBILIS L.) BY USING DIFFERENT GROWTH MODELS FROM IZMIR BAY, AEGEAN SEA, TURKEY(Parlar Scientific Publications (P S P), 2019) Demirci, Aydin; Acarli, SefaThe study was carried out at Karantina Island located on the west side of Izmir Bay, Aegean Sea, Turkey. The fan mussel spats were cultured on the single long line system. Shell length and total weight of spats were measured monthly from December 2004 to April 2006. In total, 590 the fan mussels were sampled, 466 of which were obtained from collectors and others were collected by diving. Age-related length and weight growth factors of the fan mussel evaluated with four different model. The RSS values of all estimates were highly reliable; length and age values were significantly higher than weight. Von Bertalanffy's growth parameters showed that the fan mussel has a slowly growing species. The maximum estimated length size obtained with bivalves was 78.58 cm, growth performance index or phi-prime test (phi') was 3.33 for Izmir Bay. According to this study also Richards and the Logic model can be found in older ages (>7 years) to be more appropriate. However, von Bertalanffy was more suitable for the older of fan mussel. As the age increases, growth decreases and even rest are expected, but the fan mussel individuals may have age related weight gain.Öğe Gamogenetic cycle, condition index and meat yield of the Noah's Ark shell (Arca noae Linnaeus, 1758) from Gerence Bay, Aegean Sea Turkey(Ege Univ, Fac Fisheries, 2018) Acarli, Sefa; Lok, Aynur; Acarli, Deniz; Kucukdermenci, AysunGamogenetic cycle, the condition index and meat yield of the Arca noae Linnaeus, 1758 (Noah's ark shell) were followed in Gerence Bay (Aegean Sea, Turkey), between August 2009 and July 2010. Temperature, salinity, chlorophyll-a, particulate organic and inorganic matter were monitored during the sampling period. According to histological observation, inactive stage was determined as 100% in September. The spawning period was observed through the year except September, with a peak from April to June. Sex ratios were not equal and females were dominant during the study period (2: 1). Meat yield, condition index and gonad index reveal a positive relationship between each other (P=0.05). Among environmental parameters, inverse relationship was only found between particulate inorganic matter and reproduction (P=0.05).Öğe Growth and mortality of Mediterranean mussel Mytilus galloprovincialis Lam., 1819, in relation to size on longline in Mersin Bay, Izmir (Turkey-Aegean Sea)(Blackwell Publishing, 2007) Lok, Aynur; Acarli, Sefa; Serdar, Serpil; Kose, Aysun; Yildiz, HarunThe growth and mortality rate of different size of mussels, Mytilus galloprovincialis, were compared in Mersin bay, Izmir. Mussel sampling was performed on a monthly basis over 1 year, together with hyrobiological parameters. Water temperature, salinity, chlorophyll a, total particulate matter (TPM) and particulate organic carbon (POC) were determined. Average chlorophyll a, TPM and POC values were 3.88 +/- 1.62 mu g L-1, 13.12 +/- 3.68 mg L-1 and 252 +/- 121.89 mu g L-1 respectively. Initial mean lengths of mussels for each size group were 10 mm (9.91 +/- 0.25 mm), 20 mm (20.14 +/- 0.29 mm), 30 mm (30.66 +/- 0.21 mm), 40 mm (40.14 +/- 0.21 mm), 50 mm (50.62 +/- 0.21 mm), 60 mm (59.77 +/- 0.21 mm) and 70 mm (69.47 +/- 0.62 mm). Maximum growth in length occurred during the spring-summer months. The annual length increments of mussel size groups were 46.22, 41.42, 30.3, 28.03, 20.63, 16.34 and 12.03 mm from small to large size groups respectively. Small mussels grew faster than large mussels and reached commercial size at the same time. Mortality was < 5% for all groups at the end of the experiment.Öğe Growth and Survival of Anadara inaequivalvis (Bruguiere, 1789) in Sufa Lagoon, Izmir, Turkey(Israeli Journal Of Aquaculture-Bamidgeh, 2012) Acarli, Sefa; Lok, Aynur; Yigitkurt, SelcukThe growth and survival of 5, 7, 9, and 11-mm juvenile blood cockle (Anadara inaequivalvis) cultured in suspended nets in Sufa Lagoon, Izmir, Turkey, were investigated. Shell length, width, and thickness and total weight were measured monthly during May 2007-May 2008. Temperature was measured every 6 h. Salinity, chlorophyll a, particulate organic matter, particulate inorganic matter, and total particulate matter were followed every two weeks. Mean increases were 16.68 and 13.46 mm and 3.62 and 5.74 g for small and large spat, respectively. Length increased significantly faster in small cockle than in large cockle (p < 0.05). Survival was 65% and 100% in small and large cockles, respectively (p < 0.05). Von Bertalanffy growth parameters L infinity (27 mm) and k (0.28/month) showed that growth performance (phi' = 3.22) was greater than for other species in the natural population. Slope b from the length-weight relationship was 3.098 +/- 0.115, indicating significantly better allometric growth (p <= 0.05). Results indicate that A. inaequivalvis is a good candidate for suspended aquaculture in the Sufa Lagoon, Turkey.Öğe Growth and survival rates of carpet shell clam (Tapes decussatus Linnaeus, 1758) using various culture methods in Sufa (Homa) Lagoon, Izmir, Turkey(Elsevier Sci Ltd, 2007) Serdar, Serpil; Lok, Aynur; Kose, Aysun; Yildiz, Harun; Acarli, Sefa; Goulletquer, PhilippeThe carpet shell clam (Tapes decussatus Linnaeus, 1758) is a candidate species for aquaculture development in Turkish waters. Our study aimed to assess the efficiency of three different methods (i.e., net, box and fenced ground) to maximize clam production. Two different net materials (hard plastic net and polyamide net) were tested in the net method trials. Conducted over 1 year between October 2001 and October 2002, an initial calibrated clam population, characterized by a 26.25 +/- 0.035 mm shell length and 3.85 +/- 0.06 g total wet weight was sampled on a monthly basis to carry out the experiments. By the end of the rearing cycle, clams reached 34.13 +/- 0.38 mm and 9.09 +/- 10.27 g in shell length and total wet weight, respectively. Significant differences in shell length and total wet weight among culture methods (P < 0.05) were reported. Both maximum growth and total wet weight, as well as survival rate (64%) were obtained using the hard plastic net method. Those overall results were likely due to both limited algae accumulation and crab predation when using hard plastic net. Therefore, this method appears the most suitable to develop further larger experimental clam aquaculture trials. Additional studies required to develop clam culture in Turkish waters are discussed. (c) 2007 Elsevier B. V. All rights reserved.Öğe Harmful Algal Blooms (HABs) and Black Mussel Mytilus galloprovincialis (Linnaeus, 1758) Culture in Izmir Bay (Iskele-Urla)-Turkey: Preliminary Results on the Annual Feeding Cycle Using a Qualitative Approach(Central Fisheries Research Inst, 2010) Lok, Aynur; Metin, Gulnur; Acarli, Sefa; Goulletquer, PhilippeConsidering the filtration capacity of mussels to qualitative particle selection, our study focused directly on ingested species by assessing mussel stomach content of various size classes (1-5 cm) over a year (August 97-June 98) rather than monitoring seawater samples. Different size of mussels (1, 2, 3, 4, 5 cm in length) was sampled monthly from the sides of fish cage floats in Urla-Izmir. Stomach contents were analyzed under microscope and different plankton species were grouped taxonomically. Bacillariophycea, Dinophyceae, Oxyphceae, Euglenophyceae as phytoplanktonic species were observed in the stomach contents of mussels as well as zooplanktonic species including Ciliata, Cladocera, Copepod, bivalve and gastropod larvae. Over the sampling period, according to the Bray-Curtis similarity test mussels' stomach for all sizes was of similar content except in August and October.Öğe Mass mortality report of the critically endangered Pinna nobilis (Linnaeus, 1758) in Gokceada (North Aegean Sea, Turkey)(Ege Univ, Fac Fisheries, 2022) Acarli, Deniz; Acarli, Sefa; Oz, Melike IdilIn August 2020, a total area of 38000 m(2) around Gokceada has been scanned to determine the current population status of Pinna nobilis. 9 stations (Yildizkoy, Manastir, Marmaros, Gizli Liman, Laz Koyu, Kapikaya, Karacavus, Karacavus shore and Kefalos) have been detected by means of SCUBA and ABC diving techniques. All specimens were found dead (total mass mortality of 100%). The total length range of P. nobilis was between 30.8 - 38.3 cm.Öğe Mussel (Mytilus galloprovincialis Lamarck, 1819) spat settlement and growth performances on artificial collectors in Dardanelles(Ege Univ, 2005) Yildiz, Harun; Lok, Aynur; Serdar, Serpil; Acarli, Sefa; Kose, AysunThis study was conducted in Kilya (Poyraz) Bay, Dardanelles between May 2002 - June 2003. Net rope 1 was hung in May 2002, net rope 2 was hung in June 2002. After one month, attachment of mussel spat on net rope 1, 2 were 2045 individual and 8813 individual in June 2002 and July 2002, respectively. It was determined that reproduction of mussel continued all over the year. But mussels which were pediveliger and postlarvae stages survival rate was determined too low in summer season. After one year, mussel length was found between 30 - 50 mm in net rope 1 collector. On the other hand, mussel length was measured between 20 - 30 mm in net rope collector.
