Predicting size at first sexual maturity from length/weight relationship: a case study with an Amazonian catfish

ABSTRACT Relationship between length and weight (LWR) is used to describe aspects concerning the life cycle of fish, but does not considers possible changes during the lifetime mainly due to the sexual maturation. Thus, this study aims to identify the size at first maturity of Auchenipterichthys longimanus (Siluriformes: Auchenipteridae) and infer if the reproductive engagement could change growth pattern, concerning the LWR. Estimates of the size at first maturity (L 50 ) were made by visual identification of gonadal development and through the gonadosomatic index (G SI ). L 50 was estimated as 12.5 cm for males and 13.0 cm for females when applied visual identification of gonads development. L 50 estimates increased to 13.05 cm for males and 13.7 cm for females when estimated from G SI values. LWR was adjusted by using a regular power function and through the polyphasic growth model, with proportionality and allometric coefficients changing in a two phases. The results indicate differences in the growth pattern concerning males and females, as well as polyphasic growth. The change in the growth pattern of the polyphasic LWR was estimated at 11.42 cm for males and 12.53 cm for females, suggesting that changes in the growth pattern can sign-out the attainment maturity in this catfish.

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Size, sex and maturity of the squid Lolliguncula diomedeae (Cephalopoda: Loliginidae) in the Gulf of Tehuantepec, México.

UNED Research Journal ◽

10.22458/urj.v7i1.867 ◽

2015 ◽

Vol 7 (1) ◽

pp. 79-87

Author(s):

María del Carmen Alejo-Plata ◽

José Luis Gómez-Márquez ◽

Jorge Eduardo Herrera-Galindo

Keyword(s):

Sexual Maturity ◽

Gonadosomatic Index ◽

Reproductive Activity ◽

Allometric Growth ◽

Relationship Type ◽

Length Relationship ◽

Gulf Of Tehuantepec ◽

Males And Females ◽

First Maturity ◽

Size At First Maturity

There is practically no information on the biology of Lolliguncula (Loliolopsis) diomedeae. We analyzed specimens caught in four shrimp fishing trips in the Gulf of Tehuantepec in 1999-2001, 2004 and 2006.Sexual maturity and gonadosomatic index (GSI) were used as indicators of reproductive activity. A total of 1 200 individuals were captured, 89% female. Females ranged from 35 to 97mm in mantle length (LDM),with a mode at 80mm and weights 2 to 30,9g; males 20,7 to 65mm LDM with a mode at 35-40mm and weights from 0,4 to 12g. Differences in the LDM and the PT between males and females were significant (KS, p<0,05). The sex ratio was 8:1 H:M (p <0,05). The weight-length relationship type is potential for both sexes, with a negative allometric growth.83% of mature females had high IGS values, in contrast to less than 20% of mature males. The size at first maturity (L50) indicates that males (42,7mm LDM) mature when shorter than females (74,5mm LDM). Maturity, IGS and oceanographic features of the Gulf of Tehuantepec indicate that L. diomedeae spawn there.

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Reproductive cycle and gonadal development of Macquarie perch, Macquaria australasica Cuvier (Percichthyidae), in Lake Dartmouth and tributaries of the Murray - Darling Basin, Victoria, Australia

Marine and Freshwater Research ◽

10.1071/mf97012 ◽

1998 ◽

Vol 49 (2) ◽

pp. 163 ◽

Cited By ~ 23

Author(s):

P. Appleford ◽

T. A. Anderson ◽

G. J. Gooley

Keyword(s):

Reproductive Cycle ◽

Gonadosomatic Index ◽

Gonadal Development ◽

Minimum Size ◽

Testicular Development ◽

Murray Darling Basin ◽

Eastern Australia ◽

Males And Females ◽

First Maturity ◽

Size At First Maturity

The gonadal development, reproductive cycle and growth of Macquarie perch, Macquaria australasica Cuvier, in Lake Dartmouth and selected tributaries of the Murray–Darling River Basin in south-eastern Australia were evaluated. Gonadosomatic index (GSI) and histological analysis were used to determine gonadal development and age and size at first maturity in the resident Lake Dartmouth population. GSI analysis was also used to determine age and size of Macquarie perch at first maturity in the inflowing Mitta Mitta River and other riverine populations within the Goulburn River catchment. Males appeared slightly smaller at first spawning than females at all sites; both sexes were fully mature at four years of age. Differences in size at first maturity were found between the lake and river populations; both males and females of river populations tended to mature at a much smaller size than the fish resident in the lake. Spawning occurred around November. Ovarian and testicular development in this species follows a pattern similar to that of other native Australian percichthyids. The implications for management of recreational fisheries based on minimum size regulations is discussed in relation to site-specific differences in growth rates and size of first maturity of fish.

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Can weight/length relationship predict size at first maturity? A case study with two species of Characidae

Neotropical Ichthyology ◽

10.1590/s1679-62252010005000013 ◽

2010 ◽

Vol 8 (4) ◽

pp. 835-840 ◽

Cited By ~ 12

Author(s):

Nelson F. Fontoura ◽

Anamélia S. Jesus ◽

Gabriel G. Larre ◽

Juliana R. Porto

Keyword(s):

Growth Pattern ◽

Sexual Maturity ◽

Rio Grande ◽

Allometric Growth ◽

Rio Grande Do Sul ◽

Power Equation ◽

Length Relationship ◽

First Maturity ◽

Size At First Maturity

A weight/length relationship was established for Astyanax jacuhiensis (Cope, 1894) (n = 370) and Cheirodon ibicuhiensis Eigenmann, 1915 (n = 701), from samples taken monthly in Fortaleza Lagoon, Cidreira, Rio Grande do Sul, from December 1991 through November 1992. Both species showed a polyphasic allometric growth pattern, each stanza described by an independent power equation controlled by a switch function. For C. ibicuhiensis, this change in the growth pattern occurred at 2.948 cm standard length (SL), close to published sizes for the attainment of female maturity. The change in the growth pattern of A. jacuhiensis (SL = 3.481 cm) was below the predicted size at first maturity, and merits further investigation. Although not conclusive, our data suggest that a complex growth pattern is frequent in nature, and perhaps is not usually identified because trends are obscured by natural variability. Despite the increased complexity resulting from the application of a more-complex equation, the identification of a change in the growth pattern could indicate important aspects of fish biology, including the attainment of sexual maturity.

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Aspects of the reproductive cycle and gonadal development of Murray cod, Maccullochella peelii peelii (Mitchell) (Percicthidae), in Lake Charlegrark and adjacent farm ponds, Victoria, Australia

Marine and Freshwater Research ◽

10.1071/mf9950723 ◽

1995 ◽

Vol 46 (4) ◽

pp. 723 ◽

Cited By ~ 11

Author(s):

GJ Gooley ◽

TA Anderson ◽

P Appleford

Keyword(s):

Gonadosomatic Index ◽

Testicular Tissue ◽

Gonadal Development ◽

Testicular Development ◽

Male Fish ◽

Farm Ponds ◽

Macroscopic Classification ◽

First Maturity ◽

Murray Cod ◽

Size At First Maturity

The gonadal development of Murray cod, Maccullochella peelii peelii, in Lake Charlegrark, Victoria, and adjacent farm ponds was evaluated. Gonadosomatic index, macroscopic classification and histological analysis were used to determine the age at first maturity and the gonadal development in this introduced population. There is a marked difference between the sexes in the size at first maturity, with females maturing at approximately 6 years of age and 2000 g in weight and males maturing at 3-4 years and 700 g. Gonadosomatic index data indicate that spawning occurs around November. Ovarian development in this species follows a pattern similar to that in a number of other teleosts. Testes have a lobular structure. Macroscopic evaluation of ovaries provided a good indication of the stage of the development of the gonad. However, the presence of spermatozoa throughout the year in the gonads of mature male fish makes the macroscopic evaluation of testicular development less reliable. Three cod, approximately 1% of the population, contained gonads with both ovarian and testicular tissue.

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Reproductive Dynamics of Iheringichthys labrosus (Lütken, 1874) (Teleostei, Pimelodidae), in the Capivara Reservoir, Paranapanema River, Parana, Brazil

Dataset Papers in Biology ◽

10.7167/2013/607541 ◽

2013 ◽

Vol 2013 ◽

pp. 1-6 ◽

Cited By ~ 2

Author(s):

Fábio Mineo Suzuki ◽

Diego Azevedo Zoccal Garcia ◽

Mário Luís Orsi

Keyword(s):

Gonadosomatic Index ◽

Abiotic Factor ◽

Mean Values ◽

Gonadal Maturation ◽

Maturation Stages ◽

Males And Females ◽

The Mean ◽

Iheringichthys Labrosus ◽

First Maturity ◽

Size At First Maturity

To study the reproductive dynamics of the mandi-beiçudo, Iheringichthys labrosus, in the Capivara Reservoir, Paranapanema River, Parana, Brazil, specimens were captured trimonthly from March 2001 to July 2004 at four sampling sites. The sex ratio showed a predominance of females in most of months sampled and the larger length classes. The majority of the individuals captured showed a standard length between 16 and 22 cm, with a maximal length of 27.5 cm. The size at first maturity was estimated to be 18.1 and 19.7 cm for females and males, respectively. Analysis of the temporal variation of the gonadosomatic index (GSI) and frequency of occurrence of gonadal maturation stages of males and females for the months sampled showed that I. labrosus reproduces during the whole year, with peak reproduction in November and December. There was a positive correlation between the mean values of GSI and variation in rainfall values, suggesting that this abiotic factor can influence the reproduction of this species. The mean absolute fecundity was 67274.5 16562.5 oocytes, and the mean relative fecundity was 350.6 186.3 oocytes per gram of total weight.

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Gonad Maturity and Fecundity of Bluecheek Silver Grunt (Pomadasys argyreus) in Palabuhanratu Bay, West Java

Tropical Fisheries Management Journal ◽

10.29244/jppt.v3i1.29481 ◽

2020 ◽

Vol 3 (1) ◽

pp. 10-15

Author(s):

Mona Agatha ◽

Yonvitner ◽

Rahmat Kurnia

Keyword(s):

Sex Ratio ◽

Condition Factor ◽

Gonadosomatic Index ◽

Gonadal Development ◽

Gonad Maturity ◽

Fish Samples ◽

Males And Females ◽

First Maturity ◽

Partial Spawner ◽

Fish Spawn

A total of 806 fish samples were collected from the catch of local fishermen. The sex ratio of Pomadasys argyreus was 1:0,90. Four stages of gonadal development were observed in males and females, which dominated by stage I and II (immature). The highest gonadosomatic index (GSI) in males was 1,14 in September, while in females was 1,80 in May. Length at first maturity of Pomadasys argyreus was 140,12 mm for males and 135,01 mm for females. The highest value of condition factor was 1,05 for males and 1,10 for females. This fish spawn partially (partial spawner) and estimated spawns throughout the year with a spawning peak in June.

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Cuttlebone morphometrics and sex identification of Sepia bertheloti (d’Orbigny, 1835) from the central-east Atlantic

Helgoland Marine Research ◽

10.1186/s10152-019-0531-0 ◽

2019 ◽

Vol 73 (1) ◽

Author(s):

Airam Guerra-Marrero ◽

David Jiménez-Alvarado ◽

Vicente Hernández-García ◽

Leticia Curbelo-Muñoz ◽

José Juan Castro-Hernández

Keyword(s):

Morphometric Analysis ◽

Growth Pattern ◽

Gonadal Development ◽

Sex Identification ◽

East Atlantic ◽

Subsequent Increase ◽

Northwest Africa ◽

Males And Females

Abstract Analysis of 322 cuttlebones of Sepia bertheloti caught in the waters of the Northwest Africa showed significant differences in growth between males and females. Morphometric analysis revealed a relatively different cuttlebone growth pattern between sexes, with males presenting faster growth in length to reach larger sizes and females displaying greater growth in width. This difference in cuttlebone growth is related to female gonadal development and the subsequent increase of the paleal cavity, providing more support and space to accommodate a higher number of oocytes.

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Polyphasic growth in fish: a case study with Corydoras paleatus (Siluriformes, Callichthyidae)

Iheringia Série Zoologia ◽

10.1590/1678-4766e2016017 ◽

2016 ◽

Vol 106 (0) ◽

Cited By ~ 1

Author(s):

José R. S. Barradas ◽

Isabel S. Lermen ◽

Gabriel G. Larré ◽

Thaís P. Martins ◽

Nelson F. Fontoura

Keyword(s):

Growth Pattern ◽

Rio Grande ◽

Allometric Growth ◽

Rio Grande Do Sul ◽

Power Equation ◽

Length Relationship ◽

First Maturity ◽

Changing Rate ◽

Specific Length

ABSTRACT A weight-length relationship was established for Corydoras paleatus (Jenyns, 1842) (Siluriformes, Callichthyidae) (n=596) from samples taken in November-December 2009 and March-April 2010, in Pinguela Lagoon (29°46'57"S; 50°11'16"W), Rio Grande do Sul, Brazil. The species showed a polyphasic allometric growth pattern, each stanza described by an independent power equation controlled by a switch function: W = a1Lb1 ∙ (1 + eRsc ∙ (L-SCP))-1 + a2Lb2 ∙ [1 - (1 + eRsc ∙ (L-SCP))-1] ; where W is the expected weight for a specific length L, a1 and a2 are the proportionality coefficients for stanzas 1 and 2, b1 and b2 are the allometric coefficients for stanzas 1 and 2, Rsc is the stanza changing rate for the switch function and SCP is the stanza changing point for the switch function. The stanza changing point was estimated as 5.28 cm, corresponding with the length at first maturity for this species Lmat (5.29 cm). Our data suggest that a complex growth pattern can be in nature, and perhaps not often identified because trends are obscured by natural variability.

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Reproductive Biology of Marine Catfish, Arius latiscutatus (Günther, 1864) and Arius gigas (Boulenger, 1911) from the Bays of Guinea

Annual Research & Review in Biology ◽

10.9734/arrb/2020/v35i830254 ◽

2020 ◽

pp. 1-13

Author(s):

Pierre Koivogui ◽

Yao Aristide Konan ◽

Bakari Coulibaly ◽

Essetchi Paul Kouamelan ◽

Tidiani Koné

Keyword(s):

Reproductive Biology ◽

Gonadosomatic Index ◽

Gonadal Development ◽

Cold Season ◽

Oocyte Diameter ◽

Chi Square ◽

Coastal Fisheries ◽

Republic Of Guinea ◽

Macroscopic Observation ◽

First Maturity

Background and Objectives: Marine catfish are abundant in the bays of Tabounsou and Sangareah in Republic of Guinea, but the knowledge on their biology is still scanty. The reproductive biology of Arius latiscutatus Günther, 1864 and A. gigas Boulenger, 1911 was studied through monthly sampling, from January to December 2016. Methodology: Fish were caught using gill nets in several sampling sites. Five gonadal stages were described, based on macroscopic observation of gonad form, size, weight, color and oocyte diameter. Results: The population was dominated by males (61%) in A. latiscutatus and females (53%) in A. gigas, showing a sex-ratio of 1:1.54 (Chi-square, P < 0.05) and 1:0.88 (P > 0.05), respectively. The length-weight relationship was a positive allometry for A. latiscutatus and A. gigas, and males (35.37 and 35.47 cm, respectively) reached first maturity earlier than females (39.7 and 40.8 cm, respectively). Changes in the gonadosomatic index (GSI) and in stages of gonadal development showed that A. latiscutatus spawned between April and October, while A. gigas spawned in May to November. The peak of condition factor was observed in June (0.68±0.05) and July (0.55±0.04) in females of A. latiscutatus and A. gigas, respectively. Conclusion: Both species, having only one annual breeding season, A. latiscutatus spawns earlier than A. gigas. Coastal fisheries should be restricted in cold season to preserve the ability of broodstock renewal for these species.

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Reproductive Biology of Coral Catshark Atelomycterus marmoratus (Anonymous [Bennett], 1830) in Seribu Islands, Indonesia

Biodiversitas Journal of Biological Diversity ◽

10.13057/biodiv/d200810 ◽

2019 ◽

Vol 20 (8) ◽

Cited By ~ 2

Author(s):

Selvia Oktaviyani ◽

WANWAN KURNIAWAN ◽

FAHMI

Keyword(s):

Reproductive Biology ◽

Gonadosomatic Index ◽

Maturity Stage ◽

Total Length ◽

Mean Size ◽

The Mean ◽

First Maturity ◽

The Relationship ◽

Monthly Variations ◽

Size At First Maturity

This study provides information on the reproductive biology of the coral catshark caught in the waters around Seribu Islands, Indonesia. A total of 257 coral catsharks were collected from February 2017 to January 2018. The total length of coral catshark ranged from 170 to 585 mm for females and 255-575 mm for males, respectively. The total weight of females ranged from 85 to 640 g and males from 100 to 620 g The sex ratio between females and males was 0.45 and it was not significantly different from the expected 1:1 ratio. The growth pattern of coral catsharks in Seribu Island was negatively allometric and the population was dominated by mature sharks. The mean size at first maturity was estimated to be 557 mm for females and 514 mm for males, based on to the relationship between the proportion between maturity stage and total length. The ovulation season was estimated occur from October to March, whereas September to April was mating season based on monthly variations of gonadosomatic index (GSI) values and the occurrence of egg cases in uterus.

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