Allometry coefficient variations of the length–weight relationship of skipjack tuna (Katsuwonus pelamis) caught in the southwest South Atlantic

2002 ◽  
Vol 55 (1-3) ◽  
pp. 307-312 ◽  
Author(s):  
Humber Agrelli Andrade ◽  
Rodrigo Oliveira Campos
Keyword(s):  
South Atlantic ◽  
Skipjack Tuna ◽  
Katsuwonus Pelamis ◽  
Weight Relationship ◽  
Relationship Of

scholarly journals KOMPOSISI UKURAN CAKALANG (Katsuwonus pelamis) HASIL TANGKAPAN HUHATE YANG DIDARATKAN DI TULEHU, AMBON

2017 ◽  
Vol 3 (3) ◽  
pp. 199 ◽  
Author(s):  
Budi Nugraha ◽  
Siti Mardlijah ◽  
Enjah Rahmat
Keyword(s):  
Total Sample ◽  
Fish Length ◽  
Small Fish ◽  
Skipjack Tuna ◽  
Katsuwonus Pelamis ◽  
Weight Relationship ◽  
Result Show ◽  
The Individual ◽  
Relationship Of ◽  
Length Frequency Data

Eksploitasi sumber daya ikan cakalang (Katsuwonus pelamis) di perairan Laut Banda telah berlangsung lama. Saat ini sumber daya ikan cakalang telah memperlihatkan tanda-tanda overfishing. Indikasi ini antara lain ditandai oleh penurunan hasil tangkapan dan ukuran individu, perubahan komposisi hasil tangkapan, serta kecenderungan meningkatnya proporsi beberapa jenis ikan berukuran kecil. Data frekuensi panjang dikumpulkan dari bulan Maret sampai Desember 2007 berjumlah 4.293 ekor. Pengukuran panjang dan bobot untuk mengetahui hubungan panjang dan bobot ikan dilakukan pada bulan Maret, Mei, Juli, dan Desember 2007 dengan jumlah contoh 296 ekor. Tulisan ini menyajikan informasi tentang distribusi ukuran panjang dan bobot, hubungan panjang dan bobot ikan cakalang dan ukuran pertama kali tertangkap (Lc) hasil tangkapan huhate yang beroperasi di perairan Laut Banda. Hasil analisis menunjukan bahwa ikan cakalang mempunyai kisaran panjang cagak (FL) antara 30-78 cmFL dan kisaran bobot antara 600-4300 g. Analisis regresi hubungan panjang dan bobot diperoleh persamaan W=0,0485 L2,751, R2=0,9427 dengan nilai koefisien regresi (r)=0,9709, dan nilai slope (b)=2,751. Dari hasil analisis tersebut diketahui bahwa pola pertumbuhan ikan cakalang bersifat allometrik negatif. Ukuran pertama kali tertangkap (Lc) ikan cakalang oleh huhate adalah 41,7 cmFL. Eksploitasi sumber daya ikan cakalang (Katsuwonus pelamis) di perairan Laut Banda telah berlangsung lama. Saat ini sumber daya ikan cakalang telah memperlihatkan tanda-tanda overfishing. Indikasi ini antara lain ditandai oleh penurunan hasil tangkapan dan ukuran individu, perubahan komposisi hasil tangkapan, serta kecenderungan meningkatnya proporsi beberapa jenis ikan berukuran kecil. Data frekuensi panjang dikumpulkan dari bulan Maret sampai Desember 2007 berjumlah 4.293 ekor. Pengukuran panjang dan bobot untuk mengetahui hubungan panjang dan bobot ikan dilakukan pada bulan Maret, Mei, Juli, dan Desember 2007 dengan jumlah contoh 296 ekor. Tulisan ini menyajikan informasi tentang distribusi ukuran panjang dan bobot, hubungan panjang dan bobot ikan cakalang dan ukuran pertama kali tertangkap (Lc) hasil tangkapan huhate yang beroperasi di perairan Laut Banda. Hasil analisis menunjukan bahwa ikan cakalang mempunyai kisaran panjang cagak (FL) antara 30-78 cmFL dan kisaran bobot antara 600-4300 g. Analisis regresi hubungan panjang dan bobot diperoleh persamaan W=0,0485 L2,751, R2=0,9427 dengan nilai koefisien regresi (r)=0,9709, dan nilai slope (b)=2,751. Dari hasil analisis tersebut diketahui bahwa pola pertumbuhan ikan cakalang bersifat allometrik negatif. Ukuran pertama kali tertangkap (Lc) ikan cakalang oleh huhate adalah 41,7 cmFL. Exploitation of skipjack tuna resources in the Banda Sea have lasted long. Currently skipjack tuna resources have been showing signs of over fishing. Indications were, among others, characterized by a decrease in the catch and the size of the individual, changes in the composition of the catch and the trend of increasing proportions of several types of small fish. Length frequency data collected from March until December 2007 amounted 4,293. Length and weight measurements to determine the length and weight relationship of fish conducted in March, May, July, and December 2007 with a total sample was 296. This paper presents information about the distribution of length and weight, length and weight relationship and the length at first capture (Lc) caught by pole and liner operating in theBanda Sea. The analysis showed that the skipjack tuna has a long range between 30-78 cmFL and weight range between 600-4300 g. Regression analysis of length and weight relationship equation was W=0.0485 L2.751, R2=0.9427 with regression coefficient (r)=0.9709, and slope value (b)=2.751. Result show that the growth pattern of skipjack tuna was negative allometric. The length at first captured (Lc) of skipjack was 41.7 cmFL.

scholarly journals Growth patterns of skipjack tuna (Katsuwonus pelamis, linnaeus 1758) caught by troll line in Prigi waters, Trenggalek East Java Indonesia

2021 ◽  
Vol 890 (1) ◽  
pp. 012047
Author(s):  
G Bintoro ◽  
T D Lelono ◽  
D Setyohadi ◽  
U Fadzilla
Keyword(s):  
Fat Body ◽  
Sampling Period ◽  
Fishing Effort ◽  
Growth Patterns ◽  
Skipjack Tuna ◽  
Market Demand ◽  
Katsuwonus Pelamis ◽  
Weight Relationship ◽  
The Pacific ◽  
Relationship Of

Abstract Skipjack tuna (Katsuwonus pelamis) is an important pelagic fish species caught in tropical and subtropical waters of the Pacific, Atlantic, and Indian oceans. Skipjack tuna (K. pelamis) is also a high economic fisheries resource in Prigi waters which is caught by troll line. High market demand results in high levels of exploitation. This study aimed to identify the length-weight relationship and biological reproduction of skipjack tuna in the Prigi waters. The research was conducted in the sampling period between December 2019 - April 2020 with total samples obtained as much as 1642 fish and was analyzed using linear regression. The results informed that the length-weight relationship of skipjack tuna was positive allometric with equation W=0.007FL3.223 which means that the fish has a fat body. The sex ratio between male and female fish is 1:1. While gonad maturity level obtained in this study is mostly in GML 1 and GML 2 which indicates that the catches were dominated by immature fish, so it is necessary to limit fishing effort so that sustainability of the skipjack tuna (K. pelamis) resource can be managed.

scholarly journals Pemanfaatan Data Biologi Ikan Cakalang (Katsuwonus pelamis) dalam Rangka Pengelolaan Perikanan Bertanggung Jawab di Perairan Teluk Bone

2012 ◽  
Vol 14 (1) ◽  
pp. 107 ◽  
Author(s):  
Muhammad Jamal ◽  
Muhammad Fedi Alfiadi Sondita ◽  
John Haluan ◽  
Budy Wiryawan
Keyword(s):  
Growth Model ◽  
Fisheries Management ◽  
Growth Pattern ◽  
Fork Length ◽  
Biological Characteristics ◽  
Skipjack Tuna ◽  
Katsuwonus Pelamis ◽  
Management Zone ◽  
Weight Relationship ◽  
First Maturity

The Bone Bay is part of Fisheries Management Zone WPPI 713 that covers Makassar strait, Flores sea and Bali sea. To such vast marinearea, fisheries management can be started from smaller region, e.g. embayment waters. Biological characteristics of skipjack tuna (Katsuwonuspelamis) are some of important information for developing fisheries management in the area. This research was aimed to determine length-weight relationship, size composititon, growth pattern and biologically feasible size of the fish. Data were obtained from fish caught byfisherman from Januari to December 2007. The bay was divided into three study areas, i.e. Northern, Centre and Southern Zones. The bcoefficients for length-weight relationship in the three zones were equal 3 [not significant]. The average fork-length (FL) in each zoneshowed similar trends: increased from January to June, then stabilized until December. Using von Bertalanffy’s growth model, the maximumFL (L ∞ of 759.75 mm is estimated for fish at age of 84 months. The length at first maturity of the fish is 465 mm (FL).

First maturity assessment and allometric growth of skipjack tuna, Katsuwonus pelamis (Linnaeus, 1758), landed at Ternate Island

2014 ◽  
Vol 2 (2) ◽  
pp. 29
Author(s):  
Adi Noman Susanto ◽  
Lawrence J.L Lumingas
Keyword(s):  
Head Circumference ◽  
Sexual Maturity ◽  
T Test ◽  
Skipjack Tuna ◽  
Allometric Growth ◽  
Katsuwonus Pelamis ◽  
Weight Relationship ◽  
Significant Difference ◽  
Student’S T ◽  
Student’S T Test

Title (Bahasa Indonesia): Pendugaan pertama matang kelamin dan pertumbuhan alometri ikan cakalang, Katsuwonus pelamis (Linnaeus, 1758), yang didaratkan di Pulau Ternate Skipjack tuna, Katsuwonus pelamis (Linnaeus, 1758), is a very important species for Indonesian fisheries.  A total of 462 specimens (254 males and 208 females) collected from fish landings in Ternate Island from November 2013 to April 2014 were used to estimate length at first sexual maturity, length-weight relationship, and length-head circumference relationship. The length at first sexual maturity (FL50) was 489.68 mm. The length-weight relationship equations were  W = 0.0001*FL2.7232 for males and W = 0.0002*FL2.6595 for females, respectively. Student’s t-test indicated significant deviation of ‘b’ from ‘3’ towards negative allometric growth (p< 0.05).  The length-head circumference relationship equations were HC = 0.5453*FL1.0263for males and HC = 0.6519*FL0.9985for females, respectively. Student’s t-test indicated no significant deviation of ‘b’ from ‘1’ towards isometric growth (p> 0.05).  Analysis of covariance showed that there was no significant difference between sexes (p> 0.05) for both relationships. Hence, a common length-weight relationship and a common length-head circumference relationship can be derived using pooled data of both sexes. Ikan cakalang, Katsuwonus pelamis (Linnaeus, 1758) merupakan  spesies yang sangat penting untuk perikanan Indonesia.  Sejumlah 462 spesimen (254 jantan dan 208 betina) ikan cakalang yang diperoleh dari ikan yang didaratkan di Pulau Ternate, selama periode November 2013 sampai April 2014 telah digunakan untuk menduga panjang matang kelamin pertama, hubungan panjang-berat, dan hubungan panjang-keliling lingkar kepala. Panjang pada saat matang kelamin pertama (PC50) adalah  489,68 mm. Persamaan hubungan panjang-berat diperoleh BT = 0,0001*PC2,7232 untuk jantan dan BT = 0,0002*PC2,6595 untuk betina. Hasil uji-t Student menunjukkan penyimpangan yang nyata ‘b’ dari ‘3’ cenderung ke arah pertumbuhan alometrik negatif (p < 0,05).   Persamaan hubungan panjang-keliling lingkar kepala diperoleh LK = 0,5453*PC1,0263 untuk jantan dan LK = 0,6519*PC0,9985 untuk betina. Hasil uji-t Student menunjukkan deviasi yang tidak nyata nilai ‘b’ dari ‘1’ yang cenderung ke arah pertumbuhan isometrik (p > 0,05).   Analisis kovarians menunjukkan bahwa tidak terdapat perbedaan yang nyata antara jantan dan betina (p > 0,05) untuk kedua hubungan tersebut di atas. Oleh karena itu, suatu hubungan panjang-berat umum dan suatu hubungan panjang-lingkar kepala umum dapat dibuat dengan menggunakan data gabungan kedua jenis kelamin.

scholarly journals Length-weight relationship of greeneye fish (Chlorophthalmus agassizi) obtained from coast off Hatay (Northeast Mediterranean)

2015 ◽  
Vol 32 (4) ◽  
pp. 209-211
Author(s):  
Asiye Başusta ◽  
Metin Çalta ◽  
Tuncay Ateşşahin ◽  
Fatih Volkan Özel
Keyword(s):  
Weight Relationship ◽  
Relationship Of

scholarly journals STATUS PERIKANAN HUHATE (POLE AND LINE) DI BITUNG, SULAWESI UTARA

2017 ◽  
Vol 14 (3) ◽  
pp. 313 ◽  
Author(s):  
Budi Nugraha ◽  
Enjah Rahmat
Keyword(s):  
Yellowfin Tuna ◽  
Fishing Ground ◽  
Thunnus Albacares ◽  
Skipjack Tuna ◽  
Katsuwonus Pelamis ◽  
Coryphaena Hippurus ◽  
North Sulawesi ◽  
The Status ◽  
Catch Composition ◽  
First Maturity

Tulisan ini menyajikan tentang status perikanan huhate di Bitung meliputi deskripsi unit penangkapan, daerah penangkapan, komposisi hasil tangkapan, catch per unit of effort, dan ukuran ikan pertama kali tertangkap. Data dikumpulkan selama tahun 2004 sampai dengan 2005. Hasil penelitian menunjukkan bahwa huhate yang terdapat di Bitung dioperasikan dengan kapal penangkapan yang terbuat dari kayu berukuran 50 sampai dengan 80 GT. Daerah penangkapan di sekitar lokasi rumpon di Laut Sulawesi dan Laut Maluku. Hasil tangkapan yang diperoleh terdiri atas cakalang (Katsuwonus pelamis), madidihang (Thunnus albacares), baby tuna (Thunnus spp.), dan tongkol (Auxis spp.) serta hasil tangkapan sampingan yaitu lemadang (Coryphaena hippurus) dan sunglir (Elagatis bipinnulatus). Hasil analisis catch per unit of effort diperoleh bahwa nilai catch per unit of effort baby tuna (Thunnus spp.) mengalami kenaikan pada bulan Agustus 2004, dan cakalang (Katsuwonus pelamis) mengalami kenaikan pada bulan September 2004. Hasil analisis terhadap ukuran pertama kali cakalang (Katsuwonus pelamis) tertangkap oleh huhate 49,3 FLcm. Ukuran ini lebih panjang dibandingkan ukuran pertama kali cakalang (Katsuwonus pelamis) matang gonad. Sedangkan hasil analisis terhadap ukuran pertama kali madidihang (Thunnus albacares) tertangkap oleh huhate 51,6 FLcm. Ukuran ini lebih pendek dibandingkan ukuran pertama kali madidihang (Thunnus albacares) matang gonad. This paper presents the status of pole and line fishery in Bitung of North Sulawesi, consisting of description of fishing gear, fishing ground, catch composition, catch per unit of effort, and length at first capture. Data were collected during the period of 2004 until 2005. Results show that the pole and line in Bitung operated by wooden vessels of 50 until 80 GT. The fishing grounds were the waters around FADs location in Sulawesi Sea and Maluku Sea. Catch composition consists of skipjack tuna (Katsuwonus pelamis), yellow fin tuna (Thunnus albacares), baby tuna (Thunnus spp.), and frigate tuna (Auxis spp.), while the bycatch consisted of dolphinfish (Coryphaena hippurus) and rainbow runner (Elagatis bipinnulatus). Catch per unit of effort analysis shows that catch per unit of effort value of baby tuna (Thunnus spp.) increased on August 2004, whereas catch per unit of effort value of skipjack tuna (Katsuwonus pelamis) increased on September 2004. The length at first capture of skipjack tuna (Katsuwonus pelamis) was 49,3 FLcm. The catch size was bigger than the length at first maturity for skipjack tuna (Katsuwonus pelamis). The length at first capture of yellowfin tuna (Thunnus albacares) was 51,6 FLcm. This catch size was smaller than the length at first maturity for yellowfin tuna (Thunnus albacares).

scholarly journals Length-Weight Relationship and Sex Ratio of Amblypharyngodon Mola in Dekar Haor of Sunamganj, Bangladesh

2018 ◽  
Vol 44 (2) ◽  
pp. 185-193
Author(s):  
PR Das ◽  
MS Uddin ◽  
MS Islam ◽  
M Biswas ◽  
MR Mia
Keyword(s):  
Sex Ratio ◽  
Freshwater Fish ◽  
Condition Factor ◽  
Correlation Coefficients ◽  
Male And Female ◽  
Positive Correlation ◽  
Average Ratio ◽  
Weight Relationship ◽  
R Value ◽  
Relationship Of

The study was carried out to determine length-weight relationship and sex ratio of a freshwater fish Amblypharyngodon mola (Hamilton 1822) collected from Dekar haor of Sunamganj district during the period of January to August 2017. A total of 2000 fishes were collected for the study and categorized these fishes into three groups namely males, females and combined sexes. Among 2000 mola 777 were male and 1223 were female. Length-weight equations and the correlation coefficients obtained for males, females and combined ones were: males Y = –1.97 + 3.00X, r = 0.883; females Y = –2.30 + 3.41X, r = 0.914 and combined Y = –2.11 + 3.16X, r = 0.904. Female’s A. mola attained more weight with the increases in length. Value of correlation coefficient ‘r’ was 0.883 for male and exhibited highly positive correlation between length and weight. On the contrary, ‘r’ value for female was 0.914 and it had also strongly positive correlation between length and weight relationships. Length-weight relationship of A. mola for male, female and combined sexes showed allometric pattern of growth. Condition factor ‘K’ for male, female and combined sexes was 1.09, 1.05 and 1.06, respectively and indicated better condition of fishes. The highest sex ratio (1 : 2.05) was found in May and the lowest (1 : 1.33) was in February. Dominance of females over males throughout the year was observed with an average ratio of male and female 1 : 1.57. Therefore, results of the study indicate that the existing hydrobiological conditions of the haor are conducive for food availability, free movement, feeding and better growth of the fish. Asiat. Soc. Bangladesh, Sci. 44(2): 185-193, December 2018

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