scholarly journals Short Communication: Biological aspects of Charybdis anisodon (De Haan, 1850) in Lasongko Bay, Central Buton, Southeast Sulawesi, Indonesia

2018 ◽  
Vol 19 (5) ◽  
pp. 1755-1762 ◽  
Author(s):  
ABDUL HAMID ◽  
YUSLI WARDIATNO
Keyword(s):  
Body Weight ◽  
Sex Ratio ◽  
Carapace Length ◽  
Short Communication ◽  
Carapace Width ◽  
Spawning Season ◽  
Growth Type ◽  
Size Growth ◽  
Males And Females ◽  
Biological Aspects

Hamid A, Wardiatno Y. 2018. Short Communication: Biological aspects of Charybdis anisodon (De Haan, 1850) in Lasongko Bay, Central Buton, Southeast Sulawesi, Indonesia. Biodiversitas 19: 1755-1762. Data on the biological aspects of Charybdis anisodon (De Haan, 1850) were still very limited. This study was aimed to determine the distribution of size, growth type, sex ratio and spawning season of C. anisodon in Lasongko Bay, Central Buton, Southeast Sulawesi. Crab collection was conducted from May 2013 to March 2014 using a crab gillnet. The carapace width of males and females C. anisodon ranged between 3.05-7.61 cm and 3.45-7.98 cm, respectively. Mann-Whitney test showed that width and length of carapace of males and females were significantly different (p<0.05). Type of growth of carapace width-body weight male and female were both allometric negative. Carapace length-body weight relationships of the males was isometric, but it was allometric negative for females. Spatially and temporally, the sex ratio of C. anisodon showed a variation, and the total sex ratio was 1: 0.38. The spawning season of C. anisodon tend to occur throughout the year.

scholarly journals Studi perbandingan adaptasi Kura-Kura Pipi Putih (Siebenrockiella crassicollis) jantan dan betina di area Kolam Konservasi Universitas Bengkulu

2019 ◽  
Vol 3 (1) ◽  
pp. 33-39
Author(s):  
Julita Pasaribu ◽  
Aceng Ruyani ◽  
Hery Suhartoyo
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Carapace Length ◽  
Growth Parameters ◽  
Carapace Width ◽  
Weight Growth ◽  
Measurement Results ◽  
Males And Females ◽  
Three Space

ABSTRACT[Adaptation study of Pipi Putih (Siebenrockiella crassicolli) sexes in conservation pond at University of Bengkulu]. This study aims to compare the adaptability of Pipi Putih turtles (Siebenrockiella crassicollis) of males and females in the conservation pond area of University of Bengkulu (UNIB). Nine S.crassicollis were kept individually in a cage, consisting of three space at three different point. S.crassicollis were fed with kangkung (Ipomea aquatica) as much as 10% of  their body weight. Growth parameters was collected every week for six weeks : (a) weight gain (WG); (b) thick growth of body (TGB); (c) growth of carapace length (GCL), (d) growth of carapace width (GCW); (e) growth of plastron length (GPL)  and (f) plastron width growth (PWG)  The measurement results show: (a) WG: male = 3.50%, female = 2.01% (b) TGB: male = 0.30%, female = -0.05%; (c) GCL: male = 0.16, female = 0.26%, (d) GCW : male = 0.566%, female = 0.47% (e) GPL: male = 0.28%, female = 0, 27% and (f) PWG: male = 1.25%, female = 1.16%. Mean turtle growth percentage of all indicators: male S. crassicollis = 0.01% and 0.69% for female S. crassicollis. We concluded that the adaptability of male S. crassicollis turtles was higher than for female S. crassicollis. Keywords: Conservation; Siebenrockiella crassicollis; turtle; adaptation.(Received August 16, 2018; Accepted January 19, 2019; Published February 26, 2019) ABSTRAKPenelitian ini bertujuan untuk membandingkan kemampuan adaptasi kura-kura pipi putih (Siebenrockiella crassicollis) jantan dan betina di area kolam konservasi Universitas Bengkulu (UNIB). Sembilan ekor S.crassicollis dipelihara secara individu di dalam kerambah. Terdapat tiga kerambah yang diletakkan pada tiga titik berbeda. Kangkung (Ipomea aquatica) merupakan pakan yang diberikan sebanyak 10% dari berat badan. Pengambilan data dilakukan sekali seminggu selama enam pekan. Parameter pertumbuhan yang diamati adalah (a) pertumbuhan berat badan (PBB); (b) pertumbuhan tebal badan (PTB); (c) pertumbuhan panjang karapaks (PPK), (d) pertumbuhan lebar karapaks (PLK); (e) pertumbuhan panjang plastron (PPP) dan (f) pertumbuhan lebar plastron (PLP). Hasil pengukuran menunjukkan: (a) PBB: jantan = 3,50 %, betina = 2,01% (b) PTB: jantan =  0,30 %, betina = -0,05% ; (c) PPK : jantan =  0,16, betina = 0,26 %, (d) PLK : jantan = 0,566%, betina = 0,47%  (e) PPP: jantan = 0,28%, betina = 0,27%  dan (f) PLP: jantan = 1,25%, betina = 1,16%. Rata-rata persen pertumbuhan kura-kura dari seluruh indikator: S.crassicollis jantan = 0,01% dan 0,69% untuk S.crassicollis betina. Berdasarkan data yang diperoleh,disimpulkan bahwa tingkat adaptasi kura-kura S.crassicollis jantan lebih tinggi daripada S. crassicollis betina. Kata kunci: Konservasi; Siebenrockiella crassicollis; kura-kura; adaptasi. 

scholarly journals Morphometric characteristics of crayfish, Cherax gherardiae, from Maybrat, West Papua, Indonesia

2018 ◽  
Vol 26 (4) ◽  
pp. 223-230
Author(s):  
Yulianus Sedik ◽  
Dominggus Rumahlatu ◽  
Bambang Irawan ◽  
Agoes Soegianto
Keyword(s):  
Sexual Dimorphism ◽  
Sex Ratio ◽  
Carapace Length ◽  
Condition Factor ◽  
Carapace Width ◽  
Allometric Growth ◽  
Morphometric Characteristics ◽  
Significant Difference ◽  
West Papua ◽  
Males And Females

Abstract The objectives of this study were to determine the length-weight relationships (LWRs), chelae length (ChL)-width (ChW) relationships, carapace length (CL)-width (CW) relationships, sexual dimorphism, and condition factor (K) of Cherax gherardiae from Maybrat, West Papua Indonesia. The sex ratio of C. gherardiae was found to be 1.04:1. The LWRs for males, females, and all individuals were W = 0.225L1.96, W = 0.181L2.02, and W = 0.187L2.03, respectively. Males and females exhibited negative allometric growth (b<3). There was no significant difference in lengths between males and females; however, the weight of males was greater than that of females. The K values for males, females, and all individuals were 3.17, 3.09, and 3.13, respectively. The ChL of the crayfish ranged from 1.0 to 7.5 cm, and the ChW ranged from 0.4 to 2.5 cm. The CL of crayfish ranged from 1.6 to 6.0 cm, and the CW ranged from 0.6 to 4.1 cm. Males had longer chelae and carapaces than did females. There was no significant difference in chelae width or carapace width between males and females. The ChL-ChW relationships for males, females, and all individuals were ChW = 0.312ChL + 0.260, ChW = 0.397ChL - 0.050, and ChW = 0.345ChL + 0.119, respectively. The CL-CW relationships for males, females, and all individuals were CW = 0.750CL-0.955, CW = 0.526CL - 0.178, and CW = 0.635CL-0.543, respectively.

scholarly journals Studi perbandingan adaptasi Kura-Kura Pipi Putih (Siebenrockiella crassicollis) jantan dan betina di area Kolam Konservasi Universitas Bengkulu

2019 ◽  
Vol 3 (1) ◽  
pp. 33-39
Author(s):  
Julita Pasaribu ◽  
Aceng Ruyani ◽  
Hery Suhartoyo
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Carapace Length ◽  
Growth Parameters ◽  
Carapace Width ◽  
Weight Growth ◽  
Measurement Results ◽  
Males And Females ◽  
Three Space

ABSTRACT[Adaptation study of Pipi Putih (Siebenrockiella crassicolli) sexes in conservation pond at University of Bengkulu]. This study aims to compare the adaptability of Pipi Putih turtles (Siebenrockiella crassicollis) of males and females in the conservation pond area of University of Bengkulu (UNIB). Nine S.crassicollis were kept individually in a cage, consisting of three space at three different point. S.crassicollis were fed with kangkung (Ipomea aquatica) as much as 10% of  their body weight. Growth parameters was collected every week for six weeks : (a) weight gain (WG); (b) thick growth of body (TGB); (c) growth of carapace length (GCL), (d) growth of carapace width (GCW); (e) growth of plastron length (GPL)  and (f) plastron width growth (PWG)  The measurement results show: (a) WG: male = 3.50%, female = 2.01% (b) TGB: male = 0.30%, female = -0.05%; (c) GCL: male = 0.16, female = 0.26%, (d) GCW : male = 0.566%, female = 0.47% (e) GPL: male = 0.28%, female = 0, 27% and (f) PWG: male = 1.25%, female = 1.16%. Mean turtle growth percentage of all indicators: male S. crassicollis = 0.01% and 0.69% for female S. crassicollis. We concluded that the adaptability of male S. crassicollis turtles was higher than for female S. crassicollis. Keywords: Conservation; Siebenrockiella crassicollis; turtle; adaptation.(Received August 16, 2018; Accepted January 19, 2019; Published February 26, 2019) ABSTRAKPenelitian ini bertujuan untuk membandingkan kemampuan adaptasi kura-kura pipi putih (Siebenrockiella crassicollis) jantan dan betina di area kolam konservasi Universitas Bengkulu (UNIB). Sembilan ekor S.crassicollis dipelihara secara individu di dalam kerambah. Terdapat tiga kerambah yang diletakkan pada tiga titik berbeda. Kangkung (Ipomea aquatica) merupakan pakan yang diberikan sebanyak 10% dari berat badan. Pengambilan data dilakukan sekali seminggu selama enam pekan. Parameter pertumbuhan yang diamati adalah (a) pertumbuhan berat badan (PBB); (b) pertumbuhan tebal badan (PTB); (c) pertumbuhan panjang karapaks (PPK), (d) pertumbuhan lebar karapaks (PLK); (e) pertumbuhan panjang plastron (PPP) dan (f) pertumbuhan lebar plastron (PLP). Hasil pengukuran menunjukkan: (a) PBB: jantan = 3,50 %, betina = 2,01% (b) PTB: jantan =  0,30 %, betina = -0,05% ; (c) PPK : jantan =  0,16, betina = 0,26 %, (d) PLK : jantan = 0,566%, betina = 0,47%  (e) PPP: jantan = 0,28%, betina = 0,27%  dan (f) PLP: jantan = 1,25%, betina = 1,16%. Rata-rata persen pertumbuhan kura-kura dari seluruh indikator: S.crassicollis jantan = 0,01% dan 0,69% untuk S.crassicollis betina. Berdasarkan data yang diperoleh,disimpulkan bahwa tingkat adaptasi kura-kura S.crassicollis jantan lebih tinggi daripada S. crassicollis betina. Kata kunci: Konservasi; Siebenrockiella crassicollis; kura-kura; adaptasi. 

scholarly journals A multivariate study of variation in two species of rock crab of the genus Leptograpsus

1974 ◽  
Vol 22 (3) ◽  
pp. 417 ◽  
Author(s):  
NA Campbell ◽  
RJ Mahon
Keyword(s):  
Carapace Length ◽  
Carapace Width ◽  
The Body ◽  
Canonical Variate ◽  
Multivariate Approach ◽  
Maximum Width ◽  
Multivariate Study ◽  
Rock Crab ◽  
Males And Females ◽  
Colour Form

A multivariate approach has been used to study morphological variation in the blue and orange-form species of rock crab of the genus Leptograpsus. Objective criteria for the identification of the two species are established, based on the following characters: width of the frontal region of the carapace; width of the posterior region of the carapace (rear width); length of the carapace along the midline; maximum width of the carapace; and the depth of the body. The first canonical variate, which differentiates between the two species, represents a contrast between the carapace width relative to the width of the front lip and the depth of the body; the blue-form species has a greater relative carapace width than has the orange form. The second canonical variate, which presents a contrast between the rear width and the carapace length, identifies males and females within each species; males have a greater relative carapace length than have females. All individuals, including 20 not used in the study, were correctly identified for colour form. The clear separation of the blue and orange forms achieved by canonical analysis supports the previously determined specific status of the two forms.

scholarly journals REPRODUCTIVE ASPECTS OF SCALLOPED PERCHLET, Ambassis nalua (HAMILTON, 1822) IN PABEAN BAY INDRAMAYU, WEST JAVA

2017 ◽  
Vol 9 (1) ◽  
pp. 113
Author(s):  
Nisha Desfi Arianti ◽  
M.F. Rahardjo ◽  
Ahmad Zahid
Keyword(s):  
Sex Ratio ◽  
Sampling Period ◽  
Spawning Season ◽  
West Java ◽  
Fish Samples ◽  
Length Range ◽  
Males And Females ◽  
Mature Fish ◽  
First Maturity ◽  
Somatic Index

<p align="center"><strong><em>ABSTRACT</em></strong></p><p><em>Scalloped perchle</em><em>t</em><em>, </em><em>Ambassis nalua</em><em>, </em><em> is one of fishes in Pabean Bay</em><em>, </em><em>Indramayu. This research aims to determine the reproductive </em><em>aspects </em><em>of Ambassis nalua in Pabean Bay Indramayu includ</em><em>ing</em><em> sex ratio, spawning season, first maturity, fecundity and spawning pattern. Fish samples were collected by trap net and trammel net at three site</em><em>s</em><em> in Pabean Bay</em><em> </em><em>from April to October 2015. A total of 424 of A. nalua were caught, consist of 114 males and 310 females; with total length range</em><em>d</em><em> from 38</em><em>.</em><em>04 to 112</em><em>.</em><em>63 mm and </em><em>total </em><em>weight </em><em>ranged from </em><em>0.37 </em><em>to </em><em>25.44 g. Sex ratio</em><em> of mature fish </em><em> </em><em>was 1:1.9</em><em>. The </em><em>mature </em><em>males and females were found </em><em>in </em><em>every month</em><em> of sampling period</em><em>. </em><em>The </em><em>gonado-somatic index (GSI) ranged from 0</em><em>.</em><em>40 to 0</em><em>.</em><em>83 </em><em>and 2.</em><em>36 to 4.54 for </em><em>male and </em><em>female</em><em>, respectively</em><em>. </em><em>The p</em><em>eak of spawning season</em><em> </em><em>was </em><em>found </em><em>in </em><em>September. The first maturity (Lm<sub>50</sub>)</em><em> </em><em>for male</em><em> and female were </em><em>79.17 mm</em><em> and </em><em>91.25 mm</em><em>, </em><em>respectively. The fecundity varied from 3</em><em>,</em><em>451–32</em><em>,</em><em>465</em><em> eggs.</em><em> </em><em>E</em><em>gg diameter </em><em>distribution </em><em>shows </em><em>that </em><em>spawning pattern of A. nalua was batch spawner.</em><strong><em></em></strong></p><p><em> </em></p><strong><em>Keywords</em></strong><em>: Ambassis nalua, spawning season, sex ratio, reproduction</em>

Panulirus echinatus population in the Brazilian oceanic ecosystem Rocas Atoll

Crustaceana ◽  
2019 ◽  
Vol 92 (2) ◽  
pp. 221-232 ◽  
Author(s):  
Juliana Gaeta ◽  
Raúl Cruz
Keyword(s):  
Sex Ratio ◽  
Carapace Length ◽  
Reproduction Period ◽  
Males And Females ◽  
The Mean ◽  
Oceanic Ecosystem ◽  
Abundant Population ◽  
Future Information

Abstract In Rocas Atoll (03°51′S 033°48′W) a most abundant population of Panulirus echinatus Smith, 1869 was observed during free dives. Numbers of males and females were almost the same, with an overall sex ratio M : F = 1.1. In addition, males are larger than females, with a mean male carapace length (CL) of 92.6 ± 1.8 mm, while the female mean CL was 72.7 ± 1.0 mm and for both sex combined the mean CL was 83.1 ± 1.4 mm. The percentage of females breeding, i.e., with a spermatophore mass or eggs, was 75.1%. More information is needed to better understand the fluctuation in densities over a year cycle, the reproduction period, and differences in CL between males and females, as well as other aspects of the biology of this species. The present work and future information could help to formulate fisheries policies aimed at protecting P. echinatus stocks.

scholarly journals Investigations of Variability of Morphometric Characteristics in Stone Crayfish in Order to Preserve Autochthonous Genome

2020 ◽  
Vol 18 (1-2) ◽  
Author(s):  
Rajko Roljić ◽  
Vera Nikolić ◽  
Nebojša Savić
Keyword(s):  
Sexual Dimorphism ◽  
Carapace Length ◽  
Carapace Width ◽  
Morphological Variability ◽  
The Body ◽  
Morphometric Characteristics ◽  
Baited Traps ◽  
Males And Females ◽  
Austropotamobius Torrentium ◽  
Stone Crayfish

This paper presents the information about morphological variability and sexual dimorphism of the stone crayfish (Austropotamobius torrentium) in the area of Korana River in Mrkonjic Grad. The crayfish were caught by hand made baited traps from October 2018 to May 2019. A total of 46 crayfish were caught, of which 33 males and 13 females. The dimensions of eight morphometric characteristics: body weight (W), body length (TBL), rostrum length (ROL), rostrum width (ROW), claw length (CLL), carapace length (CPL), carapace width (CPW) and abdomen length (ABL), were analyzed, both in males and females. Also, the body condition was determined for all individuales. The measurements results of morphometric characteristics partially matched into the alredy known range of variations. These data presens first ones for the observed area. By using Mann-Whitey U-test, it was noted that there are significant differences between the sexes for W, TBL, CLL, CPL, CPW and ABL. These resuls could be explained by sexual dimorphism of the stone crayfish.

scholarly journals Studies on the Gonadosomatic Index and Fecundity of Mystus gulio (Ham.)

2013 ◽  
Vol 19 (2) ◽  
pp. 161-166 ◽  
Author(s):  
MA Islam ◽  
M Begum ◽  
HK Pal ◽  
MJ Alam
Keyword(s):  
Body Weight ◽  
Sex Ratio ◽  
Body Length ◽  
Gonadosomatic Index ◽  
Spawning Season ◽  
Gonad Weight ◽  
Total Length

The study was conducted for a period of twelve months from January to December 2006 to determine the gonadosomatic index (GSI) and fecundity of Mystus gulio. Total 370 of Mystus gulio were examined during the study period. The sex ratio (male:female) of the investigated fish was 1:1.22 and generally female was larger than male. The fish was found to have a wide spawning season (March to November) with a single spawning peak in July as indicated by the gonadosomatic index and ova diameter. Fecundity of the fish was ranged from 3,891 to 1,68,358 with an average of 32,909.49 during the period of study and was found to increase with the increase of body length and weight. The relationships between fecundity and total-length, body-weight, gonad-length and gonad-weight were found linear and statistically highly significant (p<0.05).DOI: http://dx.doi.org/10.3329/pa.v19i2.16957 Progress. Agric. 19(2): 161 - 166, 2008

Comparative morphology of the Euphrates soft-shelled turtle, Rafetus euphraticus (Daudin, 1802) (Reptilia, Testudines) in Southeastern Anatolia

1998 ◽  
Vol 19 (3) ◽  
pp. 281-291 ◽  
Author(s):  
Ertan TaŞkavak
Keyword(s):  
Sexual Dimorphism ◽  
Sex Ratio ◽  
Carapace Length ◽  
Carapace Width ◽  
Comparative Morphology ◽  
Head Width ◽  
Morphometric Measurements ◽  
Allopatric Populations ◽  
The Past

AbstractMorphometric measurements and ratios were recorded in Euphrates soft-shelled turtles, Rafetus euphraticus, sampled in the Euphrates and Tigris rivers and tributaries, Southeastern Anatolia. According to nine morphometric ratios, there are clear differences between two allopatric populations of R. euphraticus, the specimens of the Tigris population being much flatter and having a wider carapace as compared with the Euphrates population. Male:female sex ratio was 2.7:1, no sexual dimorphism was present in the morphometric ratios. Rafetus euphraticus and Trionyx triunguis, which were considered congeneric in the past, differed from each other in the ratios of the carapace length/carapace width, carapace length/plane of the greatest carapace width, carapace length/plastron length, carapace length/rostrum length, carapace width/plastron length, carapace width/head width and plastron length/rostrum length.

scholarly journals BIOLOGI REPRODUKSI IKAN SELAR BENTONG (Selar crumenophthalmus Bloch, 1793) DI PERAIRAN NATUNA, LAUT CINA SELATAN

2018 ◽  
Vol 10 (2) ◽  
pp. 105
Author(s):  
Moh Fauzi ◽  
Isdradjad Setyobudiandi ◽  
Ali Suman
Keyword(s):  
Sex Ratio ◽  
Spawning Season ◽  
Maturity Stage ◽  
Biological Aspect ◽  
Population Decrease ◽  
Intensive Exploitation ◽  
Males And Females ◽  
Biological Reproduction ◽  
First Maturity ◽  
In The Beginning

Ikan selar bentong (Selar crumenophthalmus) merupakan salah satu jenis ikan pelagis kecil yang cukup dominan tertangkap di perairan Natuna, Laut Cina Selatan. Pemanfaatan yang semakin intensif oleh perikanan pukat cincin dikhawatirkan akan mengakibatkan penurunan populasinya. Pengetahuan tentang biologi ikan selar bentong penting sebagai dasar pertimbangan pengelolaannya. Penelitian ini bertujuan menganalisis karakter biologi reproduksi ikan selar bentong di perairan Natuna, meliputi nisbah kelamin, ukuran rata-rata pertama kali matang gonad, ukuran rata-rata tertangkap (L50%), tingkat kematangan gonad dan dugaaan musim pemijahan. Penelitian dilakukan dengan mengumpulkan ikan contoh hasil tangkapan pukat cincin yang didaratkan di PPN Pemangkat Kalimantan Barat selama 5 tahun (2012-2016). Hasil penelitian menunjukkan Nisbah kelamin ikan jantan dan betina adalah 1:1.05. Sebagian besar ikan dalam stadium pematangan (ripening, TKG 3). Ikan bentong mengalami dua musim pemijahan yakni pada awalmusim timur (Juni-Juli) dan awal musim barat (Desember-Januari). Ukuran rata-rata tertangkap (L50%) sebesar 18 cm FL lebih kecil dari nilai pertama kali matang gonad (Lm) yakni 20,2 cm FL. Nilai Lc yang lebih kecil daripada nilai Lm mengindikasikan terjadinya growth overfishing.Bigeye scad (Selar crumenophthalmus) dominantly caught by fishers in the Natuna watersof South China Sea. The intensive exploitation rate of this species by purse seiner led to population decrease. The understanding on biological aspect of bigeye scad is important as a consideration on arranging a proper management. This study aims to analyze biological reproduction of bigeye scad in the Natuna waters, such as sex ratio, length at first maturity, length at first capture, gonad maturity stage and the estimation of spawning season. This research is conducted by sampling the fishes that caught by purse seine fleets which is landed in AFP Pemangkat, West Borneo for 5 years (2012 to 2016). The result showed that sex ratio of males and females were balance by 1:1,05. It dominated by fish that are ripening stage. Spawning season happens twice per year which are in the beginning of east season on June to July and at the beginning of west season on December to January. Length at first capture (L50%) is 18 cmFL lower than length at first maturity (Lm = 20,2 cmFL) this condition indicated growth overfishing occurred in this fishery.

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