Reproductive aspects of the flyingfish, Hirundichthys affinis from the Northeastern coastal waters of Brazil

The epipelagic flyingfish, Hirundichthys affinis is a major artisanal fishery resource from the Northeastern coastal waters of Brazil. However, biological information about this species has been poorly documented. This paper presents data on the length-weight relationship, sex ratio, length at first sexual maturity, gonadal development and fecundity of H. affinis sampled from the coastal waters of Rio Grande do Norte, Brazil. The total body length and weight for both sexes ranged from 23.4 to 29.4 cm and from 89 to 188g, respectively. The allometric coefficient of males was 2.208 and that of females was 2.985, indicating negatively allometric growth. The sex ratio was 1M:1.6F thus differing from the expected ratio of 1:1 (χ2 = 18.63). The total length at first sexual maturity was estimated at 27.3 cm for males and 27.1 cm for females. The macroscopic characteristics of the gonads indicated four maturation stages. Histological studies of gonads of H. affinis showed seven phases of oocyte development and four phases of spermatocyte development. The mean absolute fecundity was 9092 vitelogenic oocytes. Spawning occurred during the months of March to July. The microscopic descriptions of the stages of gonad maturation indicate that the study area is an important spawning ground of H. affinis.

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Reproductive Biology of Round Sardinella (Sardinella Aurita) (Valenciennes, 1847) in Senegalese Coastal Waters

Journal of Biology and Life Science ◽

10.5296/jbls.v9i1.12222 ◽

2018 ◽

Vol 9 (1) ◽

pp. 31

Author(s):

Ismaïla NDIAYE ◽

Alassane SARR ◽

Alioune FAYE ◽

Modou THIAW ◽

Malick DIOUF ◽

...

Keyword(s):

Sex Ratio ◽

Reproductive Biology ◽

Coastal Waters ◽

Sexual Maturity ◽

Reproductive Parameters ◽

Monthly Variation ◽

Relative Fecundity ◽

The Mean ◽

Sardinella Aurita ◽

Somatic Index

In this study, a total of 1068 specimens Sardinella aurita of which 553 females and 515 males were examined. The objectif of this study was to determine the reproductive parameters of Sardinella aurita. The sex ratio was significantly in favor of females (55%). The size at first sexual maturity was estimated at 18.9 cm for females and 18.0 cm for males. The monthly variation of sexual maturity stages and gonado-somatic index (GSI) allowed to locate the reproduction periods from February to June and from September to December. The mean absolute fecundity was estimated at 110.794 ± 7582 oocytes whereas relative fecundity was about 422 ± 26 oocytes per gram of female.

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Gonad development and reproduction of the ballyhoo half beak, Hemiramphus brasiliensis from the coastal waters of Rio Grande do Norte, Brazil

Brazilian Journal of Biology ◽

10.1590/1519-6984.12113 ◽

2015 ◽

Vol 75 (2) ◽

pp. 324-330

Author(s):

MR. Oliveira ◽

NB. Silva ◽

ME. Yamamoto ◽

S. Chellappa

Keyword(s):

Coastal Waters ◽

Sexual Maturity ◽

Gonad Development ◽

Rio Grande ◽

Reproductive Period ◽

Batch Fecundity ◽

Histological Studies ◽

Rainy Period ◽

Multiple Spawner ◽

Maturation Stages

The gonad development and reproductive aspects of Hemiramphus brasiliensis from the coastal waters of Rio Grande do Norte, Brazil were verified. This paper presents data on the length-weight relationship, sex ratio, length at first sexual maturity, gonad development, reproductive period and fecundity of H. brasiliensis. Females of this species predominated in the sampled population and were larger in size than the males. The length at the first sexual maturation of males was 20.8 cm and that of females was 21.5 cm. The macroscopic characteristics of the gonads indicated four maturation stages. Histological studies of gonads of H. brasiliensis showed six phases of oocyte development and four phases of spermatocyte development. The batch fecundity of this species is 1153 (±258.22) oocytes for 50 g body weight of female. The microscopic characteristics of gonad development indicate that H. brasiliensis is a multiple spawner, with active reproductive period during the months of January to June and October. The reproductive period of this species is independent of the rainy period of the region.

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Temporal Dynamics of Reproduction inHemiramphus brasiliensis(Osteichthyes: Hemiramphidae)

The Scientific World JOURNAL ◽

10.1155/2014/837151 ◽

2014 ◽

Vol 2014 ◽

pp. 1-8 ◽

Cited By ~ 2

Author(s):

Mônica Rocha de Oliveira ◽

Sathyabama Chellappa

Keyword(s):

Coastal Waters ◽

Sexual Maturity ◽

Temporal Dynamics ◽

Gonadosomatic Index ◽

Gonad Development ◽

Reproductive Period ◽

Northeastern Brazil ◽

Histological Studies ◽

Multiple Spawner ◽

Maturation Stages

The reproductive aspects ofHemiramphus brasiliensiswere analyzed with a view to verify the temporal dynamics of reproduction. This paper presents data on sex ratio, length at first sexual maturity, macroscopic and histological aspects of gonad development, gonadosomatic index (GSI), reproductive period, and fecundity ofH. brasiliensis. The fishes were captured from the coastal waters of Rio Grande do Norte, northeastern Brazil. Females of this species predominated in the sampled population and were larger in size than the males. The length at the first sexual maturation of males was 20.8 cm and that of females was 21.5 cm. The macroscopic characteristics of the gonads indicated four maturation stages. Histological studies of gonads ofH. brasiliensisshowed six phases of oocyte development and four phases of spermatocyte development. The batch fecundity of this species was 1153 (±258.22) mature oocytes for 50 g body weight of female. The microscopic characteristics of gonad development indicate thatH. brasiliensisis a multiple spawner, presenting a prolonged reproductive period during the whole year, with a peak in the month of April, and is considered as an opportunistic strategist.

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Gonadal development in males of the orange mud crab, Scylla olivacea (Herbst, 1796) (Decapoda, Brachyura, Portunidae)

Crustaceana ◽

10.1163/15685403-00003622 ◽

2017 ◽

Vol 90 (1) ◽

pp. 1-19 ◽

Cited By ~ 19

Author(s):

K. Waiho ◽

H. Fazhan ◽

S. Jasmani ◽

M. Ikhwanuddin

Keyword(s):

Germ Cells ◽

Reproductive System ◽

Vas Deferens ◽

Gonadosomatic Index ◽

Gonadal Development ◽

Gonad Maturation ◽

Mud Crab ◽

Maturation Stages ◽

Histological Characteristics

This study describes the morphological and histological characteristics of the male reproductive system of the orange mud crab, Scylla olivacea (Herbst, 1796). Three maturation stages were determined on the basis of the vas deferens diameter, the gonad colour and the gonadosomatic index (GSI). Significant differences were observed in the GSI value as the crabs matured. All germ cells were present in the histological sections of the testes, and these decrease significantly in size as they progress from spermatogonia, spermatocytes, and spermatids to spermatozoa. Spermatophores are found in the anterior vas deferens (AVD) and median vas deferens (MVD) of all maturation stages but not in the posterior vas deferens (PVD), with a significantly smaller size in immature and maturing specimens. Thus, the classification of S. olivacea gonads into various maturation stages based solely on histological characteristics (i.e., the presence of spermatophores) is impossible. Therefore, the combination of both microscopic and macroscopic features is essential for determining the gonad maturation stages of male S. olivacea.

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Reproduction of tank goby(Glossogobius giuris) in Ujung Pangkah Waters, East Java

Jurnal Akuakultur Indonesia ◽

10.19027/jai.11.64-75 ◽

2013 ◽

Vol 11 (1) ◽

pp. 64

Author(s):

. Sulistiono

Keyword(s):

Sex Ratio ◽

Body Length ◽

Total Body Length ◽

Maturity Stage ◽

Oocyte Diameter ◽

Gonad Maturity ◽

Fish Samples ◽

Total Body ◽

Glossogobius Giuris ◽

Somatic Index

Tank goby (Glossogobius giuris) is a commonly fish found in coastal area. This study was aimed to investigate reproduction of the fish. Samples were collected from July to December 2005 from fish caught by fishermen using gill net and trap net in Ujung Pangkah Waters. Analysis was done to estimate sex ratio, gonad maturity, gonado somatic index, fecundity, and oocyte diameter. During the observation, the tank goby fish was 198 individual consisted of 112 male and 86 female fish varied 63‒230 mm in total body length. Sex ratio was around 1:1.1. First maturity gonad of male was 111‒134mm and female was 87‒110 mm total body length, respectively. According to gonad maturity stage and gonado somatic index, the fish was estimated to spawn from July to December. During July and August, the gonad maturity stage and gonado somatic index were higher indicating a lot of spawning fish during those months. Fecundity was 10,640‒150,639eggs and oocyte diameter was 49‒372 µm. Based on the oocyte distribution, the fish was estimated apartial spawner. Keywords: Ujung Pangkah Waters, reproduction,tank goby,Glossogobius giuris

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Size Structure and Sex Ratio of Black Tip Reef Shark (Carcharhinus melanopterus) Landed in the TPI Paotere of Makassar City and TPI Beba of Takalar Regency, Province South Sulawesi

Agrikan Jurnal Agribisnis Perikanan ◽

10.29239/j.agrikan.13.2.232-237 ◽

2020 ◽

Vol 13 (2) ◽

pp. 232

Author(s):

Faisal Amir ◽

Achmar Mallawa ◽

Joeharnani Tresnati

Keyword(s):

Sex Ratio ◽

Size Structure ◽

Average Length ◽

Total Body Length ◽

Survey Method ◽

Male And Female ◽

South Sulawesi ◽

Landing Sites ◽

Total Body ◽

Carcharhinus Melanopterus

Carcharhinus melanopterus in the southern waters of the Makassar Strait is caught with bottom longlines and bottom gill nets as bycatch, caught throughout the year without any management arrangements. The research objective was to obtain information about the size structure and sex ratio of C. melanopterus in the southern waters of the Makassar Strait. The method used is a survey method. Sample measurements were carried out at TPI Paotere Makassar City and TPI Beba Takalar Regency, South Sulawesi Province from July to September 2020. Measurement of total body length (TL:cm) and determining the sex ratio were carried out directly in the field. The results of the study on 144 sample fish showed that the total length range for C. melanopterus landed at the Paotere TPI was the same as those landed at the Beba TPI at sizes between 58 - 135 cm TL with an average length of 91.18 ± 3.32 cm TL and sizes between 51 - 139 cm TL with an average length of 91.1±2.21 cm TL for both male and female sex, respectively.The comparison of C. melanopterus landed in the two fish landing sites was in a balanced state but the male sex was smaller than the female sex.The sex ratio of male and female C. melanopterus is balanced. Most (69.44%) female C. melanopterus caught were relatively young.

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Reproduction De Heterotis Niloticus (Cuvier, 1829) De La Riviere Agneby (Cote d’Ivoire)

European Scientific Journal ESJ ◽

10.19044/esj.2016.v12n6p83 ◽

2016 ◽

Vol 12 (6) ◽

pp. 83 ◽

Cited By ~ 1

Author(s):

Kouakou Fokouo Kessia Irène ◽

Koné Tiéhoua ◽

Soro Yaya ◽

N’Da Konan ◽

Ouattara Mamadou

Keyword(s):

Sex Ratio ◽

Reproductive Biology ◽

Standard Length ◽

Sexual Maturity ◽

Condition Factor ◽

Artisanal Fishing ◽

Relative Fecundity ◽

Maturation Stages ◽

Liver Somatic Index ◽

Somatic Index

The reproductive biology of Heterotis niloticus has been studied from monthly samples taken from artisanal fishing on the Agneby river during the period june 2013 to May 2015. The whole sample consisted of 498 specimens of which 269 females and 229 males were examined. Sex-ratio observed was in favour of females (1: 1.17; X2 = 3.21; p > 0.05). The monthly evolution of the gonado-somatic index (GSI), the liver-somatic index (LSI), the condition factor (K) and maturation stages suggests that this fish has two periods of reproduction. The two periods were respectively from june to august and from november to december. The standard length at first sexual maturity was 490.6 mm for females and 436.3 mm for males. The absolute fecundity was ranged from 5424 to 25591 oocytes in females of 595 mm to 780 mm standard length. The relative fecundity was 3752± 1491 oocytes/kg of female.

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Reproductive Biology of Land Crabs (Gecarcoidea lalandii) in Ly Son Island, Quang Ngai Province – Vietnam

Annual Research & Review in Biology ◽

10.9734/arrb/2021/v36i130336 ◽

2021 ◽

pp. 111-120

Author(s):

Huynh Minh Sang ◽

Le Thi Thu Thao ◽

Ho Son Lam ◽

Phan Minh-Thu

Keyword(s):

Reproductive Biology ◽

Sexual Maturity ◽

Carapace Width ◽

Gonadal Development ◽

Spawning Season ◽

Female Crab ◽

Fishery Resource ◽

Land Crab ◽

Male Crab ◽

Land Crabs

The reproductive biology of the land crab Gecarcoidea lalandii was documented for the Ly Son Island, Quang Ngai Province, Vietnam. Approximately 30 crabs, collected every month in the 12-month period from August 2019 to July 2020, were analyzed gonadal development stages, sex ratio, spawning season, fecundity and size at first sexual maturity. Results showed that number of male and female crab in nature was not significantly different. Gonadal of the crab passed through five stages of maturation. The crab spawns continuously during the spawning season. In nature, the crab can mature whole year-round with a higher proportion from January to August and the peak maturation from June to July. The spawning season is of this species is only on the raining period from June to July. Length at first sexual maturity of the crab was 53.91 mm of carapace width for female and 50.39 mm male crab. The absolute fecundity varied in 473,000-820,000 eggs ind-1 and highly related to body weight. The current findings provide the scientific foundation for fishery resource management and artificial breeding of the land crab in Ly Son.

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Growth and reproduction in harbour porpoises (Phocoena phocoena) in Icelandic waters

NAMMCO Scientific Publications ◽

10.7557/3.2747 ◽

2003 ◽

Vol 5 ◽

pp. 195 ◽

Cited By ~ 8

Author(s):

Droplaug Ólafsdóttir ◽

Gísli A Víkingsson ◽

Sverrir Daníel Halldórsson ◽

Jóhann Sigurjónsson

Keyword(s):

Body Size ◽

Sex Ratio ◽

Coastal Waters ◽

Sexual Maturity ◽

Phocoena Phocoena ◽

Age Classes ◽

Present Collection ◽

Growth And Reproduction ◽

Exact Timing ◽

Icelandic Waters

A total of 1,268 harbour porpoises were obtained from fishing nets in Icelandic coastal waters from September to June in the years 1991 to 1997. Foetal sex ratio was 1.2:1 (male:female). The bias towards males increased further among older animals in the present collection. The modal year classes were 0 and 1 years but the oldest porpoise was a female estimated at 20 years of age. Length at birth was estimated as approximately 75 cm, and females grew faster and attained larger sizes than males. Asymptotic length was 149.6 cm for males and 160.1 cm for females. Estimated age and length at sexual maturity was 1.9 to 2.9 years and 135 cm for males and 2.1 to 4.4 years and 138 to 147 cm for females. Immature individuals were significantly shorter than pubertal and mature animals in both sexes in age classes 1 to 3. Testes weight increased only slightly with body size in immature males but increased rapidly around maturity. Pronounced seasonality was alsoobserved in testes weight, indicating a peak in testes activity in summer. Lack of data from the summer makes the exact timing of parturition and mating unknown. Births do, however, most likely peak in June and July and lactation lasts at least 7 to 8 months. Ovulation and pregnancy rates were 0.98.

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Estructura de la población del cangrejo rojo de manglar, Goniopsis cruentata (Decapoda: Grapsidae) bajo diferentes impactos de pesca: Implicaciones para la gestión de los recursos.

Revista de Biología Tropical ◽

10.15517/rbt.v63i2.15432 ◽

2015 ◽

Vol 63 (2) ◽

pp. 443 ◽

Cited By ~ 1

Author(s):

Gustavo L. Hirose ◽

Laize S. Souza ◽

Sonja L. R. Silva ◽

Douglas F. R. Alves ◽

Maria Lucia Negreiros-Fransozo

Keyword(s):

Body Size ◽

Sex Ratio ◽

Sexual Maturity ◽

Abiotic Factors ◽

Mangrove Ecosystem ◽

The Body ◽

Sediment Surface ◽

Brazilian Coast ◽

Catch Per Unit Effort ◽

Fishery Resource

The red mangrove crab, Goniopsis cruentata, influences the recruitment and composition of plant species in the mangrove ecosystem and it is an important fishery resource. Nevertheless, no current management and conservation plans are available for this species for the Brazilian coast. This investigation evaluated the population structure and reproductive biology in populations of G. cruentata under contrasting fishery pressures. The sampling program was carried out in two mangroves, Vaza-Barris and Sergipe River, from January through December 2011. Crabs from both mangroves were randomly collected by a professional fisherman during daytime low tide periods, using a fishing rod baited with pieces of a locally abundant gastropod, Pugilina morio, during 20min/area (catch per unit effort). Monthly measurements of air, sediment surface layer and water temperatures were obtained with a digital thermometer and salinity with an optical refractometer. Both crab populations were compared concerning their abundance, body size, sex ratio, size at onset of sexual maturity and fecundity (FI). Abiotic factors (air, water and mud temperature; and salinity) showed no significant differences between sampling localities. A total of 4 370 crabs were sampled, 2 829 from the Sergipe River and 1 541 from the Vaza-Barris River. The abundance and body size of crabs were compared between mangroves, and statistically significant differences were found. The sex ratio for both populations differed from the expected 1:1 ratio, and a significant deviation in favor of juvenile males was obtained, while adults showed a bias toward females. The estimated size at onset of sexual maturity for both sexes was similar in both populations. However, the populations differed significantly in the number and volume of eggs: a higher FI was obtained in females from the Sergipe River, while a higher egg volume was observed in females from the Vaza-Barris River mangrove. These results indicated a tendency to decrease the body size, the abundance of crabs and the reproductive potential of the species, with higher fishing intensities, reinforcing the need to develop a management plan as well as to establish conservation units for G. cruentata in the Northeastern Brazilian coast. Habitat loss in conjunction with long-term overfishing can have irreversible consequences, which can impact not only the populations of commercially exploited crabs, but the dynamics of virtually the entire mangrove ecosystem.

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