Tissue biochemical composition in relation to the reproductive cycle of deep-sea decapod Aristeus antennatus in the Portuguese south coast

2003 ◽  
Vol 83 (5) ◽  
pp. 963-970 ◽  
Author(s):  
R. Rosa ◽  
M.L. Nunes
Keyword(s):  
Fatty Acids ◽  
Reproductive Cycle ◽  
Neutral Lipids ◽  
Gonadosomatic Index ◽  
Cholesterol Content ◽  
South Coast ◽  
Hepatosomatic Index ◽  
Maturity Stage ◽  
Lipid Levels ◽  
Aristeus Antennatus

Biochemical changes during the reproductive cycle of Aristeus antennatus (Crustacea: Decapoda) on the Portuguese south coast were investigated. Proximate chemical composition, lipid classes, fatty acid profiles, glycogen and cholesterol content were determined in the muscle, ovary and hepatopancreas (HP) during a period of one year (October 2000–September 2001). Gonadosomatic index (GSI) increased significantly in June and July and during the maturation process. Hepatosomatic index (HSI) also increased throughout the ovarian maturation. A positive correlation between lipid levels in the ovary and GSI (r=0.53, P<0.05) and HSI (r=0.30, P<0.05) was found. The muscle showed very low lipid levels and higher percentages of polar lipids. Higher proportions of neutral lipids, mainly triacylglycerols, were observed in both ovary and HP. Both ovarian and HP cholesterol increased with maturation. Protein and glycogen content in the muscle, ovary and HP did not vary as a function of ovary maturity stage. From the different tissues analysed, the glycogen is mainly stored in the HP and to a lesser extent in the muscle. In both ovary and HP the major fatty acids were 16:0, 18:1(n-7), 18:1(n-9), 20:5(n-3) and 22:6(n-3), and significant increase in the levels of monounsaturated fatty acids were observed in ovary during sexual maturation, which indicates these compounds as the major sources of energy during embryonic and early larval development.

Plasma steriod hormone concentrations in relation to reproductive cycle of the sweep Scorpis lineolatus (Kyphosidae) caught from the wild

1992 ◽  
Vol 43 (4) ◽  
pp. 753 ◽  
Author(s):  
M Deual ◽  
NW Pankhurst
Keyword(s):  
Steroid Hormones ◽  
Reproductive Cycle ◽  
Gonadosomatic Index ◽  
Plasma Concentrations ◽  
Plasma Testosterone ◽  
Hepatosomatic Index ◽  
Spawning Period ◽  
Testosterone Concentration ◽  
Low Concentrations ◽  
Advanced Stages

Changes in gonadosomatic index (GSI), hepatosomatic index (HSI), oocyte development and plasma levels of steroid hormones were studied during the reproductive cycle of the sweep Scorpis lineolatus. GSI values for both sexes were maximal in March and April. During this period the size distribution of oocytes showed a predominance of advanced stages of vitellogenesis, whereas males were completing spermatogenesis. However, staging data suggest that spawning may not begin until April. HSI was maximal 2 months prior to the beginning of gametogenesis in both sexes. Plasma concentrations of oestradiol-17β in females increased rapidly from February, reached a peak (2.3 ng mL-1) in association with the end of vitellogenesis in March, and returned to low concentrations in May and June. Plasma concentrations of 17α,20α-dihydroxy-4-pregnen-3-one (17,20βP) also peaked in March in females, but 17,20βP was generally not detectable in males. Plasma testosterone concentration peaked along with other steroids in March in females but showed no significant change in males. Plasma ll-ketotestosterone (1 1KT) concentration was maximal in males before spawning (February), but was not elevated during the spawning period itself. Changes in oestradiol-17β and testosterone in association with vitellogenensis in females are consistent with those reported for other teleosts, whereas changes in 17,20βP, testosterone and 11-ketotestosterone in males are different from those previously reported.

scholarly journals Reproductive biology of Moenkhausia intermedia (Eigenmann) (Pisces, Characiformes) in Itumbiara Reservoir, Goiás, Brazil

2004 ◽  
Vol 21 (3) ◽  
pp. 519-524 ◽  
Author(s):  
Renê Eiji Souza Hojo ◽  
Gilmar Bastos Santos ◽  
Nilo Bazzoli
Keyword(s):  
Sexual Dimorphism ◽  
Reproductive Biology ◽  
Reproductive Cycle ◽  
Standard Length ◽  
Gonadosomatic Index ◽  
Maturity Stage ◽  
Female Predominance

To study the reproductive biology of Moenkhausia intermedia (Eigenmann, 1908) in Itumbiara reservoir, Paranaíba river, Goiás, Brazil, a total of 301 specimens (237 females and 64 males) were captured quaterly from January to December 1993. The gonadosomatic index of females and males were related to morphologic variations of the gonads in different reproductive cycle stages (RCS). Analysis of RCS frequency and variations in the gonadosomatic index showed that M. intermedia reproduces during the whole year with fractional spawning. The smallest standard length at advanced maturity stage was estimated as 6.6 cm for females and 6.0 cm for males. The stomach repletion and coelomic fat indexes of both sexes reached peak values in the rest stage, suggesting that this species probably store energy in this phase and consume its fat reserve during reproduction. In the Itumbiara reservoir there was female predominance (4:1). Males were smaller than females, indicating sexual dimorphism in M. intermedia.

Impact of the cestodeTriaenophorus nodulosuson the exoticLepomis gibbosusand the autochthonousPerca fluviatilis

Parasitology ◽  
2014 ◽  
Vol 142 (6) ◽  
pp. 745-755 ◽  
Author(s):  
G. MASSON ◽  
M. VANACKER ◽  
M. G. FOX ◽  
J.-N. BEISEL
Keyword(s):  
Gonadosomatic Index ◽  
Perca Fluviatilis ◽  
Parasite Load ◽  
Parasite Prevalence ◽  
Condition Index ◽  
Final Host ◽  
Lepomis Gibbosus ◽  
Hepatosomatic Index ◽  
Maturity Stage ◽  
Eurasian Perch

SUMMARYThe effects of plerocercoids of the cestodeTriaenophorus nodulosusinfecting the livers of native Eurasian perchPerca fluviatilisand non-native pumpkinseedLepomis gibbosuswas investigated in 17 sites along the Moselle watershed. With a single exception, infected individuals were not observed in the main channel whether or not northern pikeEsox lucius, a final host, was present. In ponds where the pike was present, the prevalence ofT. nodulosusaveraged 86% in Eurasian perch and 15% in pumpkinseed. The parasite was not present at all in ponds when pike were absent. Parasite load, hepatosomatic index (HSI), gonadosomatic index (GSI) and body condition index (CI) were compared between hosts in one site where parasite prevalence and fish abundance was highest. HSI in infected perch was significantly higher than in uninfected perch, whereas no differences in HSI were detected between infected and uninfected pumpkinseed. While perch were more frequently infected and had a greater average parasite load than pumpkinseed, there were no significant differences in either indicator between the two species. Furthermore, no significant differences in GSI or CI were observed between infected and uninfected fish in either species, by either gender or maturity stage. We hypothesize that pumpkinseed is more resistant to the parasite or less likely to feed upon infected copepods than perch.

The reproductive cycle of the smooth skate, Malacoraja senta, in the Gulf of Maine

2007 ◽  
Vol 58 (1) ◽  
pp. 98 ◽  
Author(s):  
James A. Sulikowski ◽  
Scott Elzey ◽  
Jeff Kneebone ◽  
Joe Jurek ◽  
W. Huntting Howell ◽  
...  
Keyword(s):  
Reproductive Cycle ◽  
Gulf Of Maine ◽  
Gonadosomatic Index ◽  
Management Plan ◽  
Biological Data ◽  
Hepatosomatic Index ◽  
Reproductive Parameters ◽  
Western Atlantic ◽  
The North ◽  
Gland Weight

The smooth skate (Malacoraja senta) is a small species of skate that is native to the waters of the north-western Atlantic. Recent assessments in the Gulf of Maine indicate that the biomass of smooth skates has declined below threshold levels mandated by the Sustainable Fisheries Act. This decline, coupled with the paucity of biological data, has prompted the National Marine Fisheries Service to prohibit the possession of smooth skates in this region. Consequently, crucial life history information is now being collected, which could be used in the formulation of a management plan. The present study describes and characterises the reproductive cycle of female and male smooth skates, based on monthly samples taken off the coast of New Hampshire, USA, from May 2001 to April 2002. Gonadosomatic index (GSI), hepatosomatic index (HSI), shell gland weight, follicle size and egg case formation were assessed for 79 female skates. In general, these reproductive parameters remained relatively constant throughout most of the year. Additionally, the size distribution of ovarian follicles in females captured each month did not vary significantly. For males (n = 81), histological stages of spermatogenesis III to VI (SIII-SVI), GSI and HSI were examined. No significant differences were detected in male reproductive parameters, and production and maintenance of mature spermatocysts within the testes were observed throughout the year. Collectively, these findings indicate that, like other north Atlantic skate species, the smooth skate is reproductively active year-round.

scholarly journals Biología reproductiva y contenido bioquímico gonadal de la cabrilla arenera, Paralabrax maculatofasciatus en la región de Bahía de Kino, Sonora//Reproductive biology and biochemical gonadal content of the spotted sand bass, Paralabrax maculatofasciatus in Kino Bay, Sonora

Biotecnia ◽  
2019 ◽  
Vol 22 (1) ◽  
pp. 74-83
Author(s):  
Enrique De-la-Re-Vega ◽  
Lorenzo Enrique Costich-González ◽  
Rafael Del Rio-Salas ◽  
Reina Castro-Longoria ◽  
José Manuel Grijalva-Chon ◽  
...  
Keyword(s):  
Gonadosomatic Index ◽  
Proximate Analysis ◽  
Male Dominance ◽  
Hepatosomatic Index ◽  
Maturity Stage ◽  
Gonadal Maturity ◽  
Sustainable Fishery ◽  
Histological Procedure ◽  
Spotted Sand Bass ◽  
Paralabrax Maculatofasciatus

A pesar de la importancia económica que representa la cabrilla arenera, Paralabrax maculatofasciatus, la información acerca de sus aspectos reproductivos es escasa, por lo que se investigó su biología reproductiva así como su composición proximal de la gónada. Para ello, se capturaron 30 organismos mensualmente de marzo 2017 a febrero 2018. Los peces se midieron, pesaron y disectaron para obtener el factor de condición (K), el índice hepatosomático (IHS) y el índice gonadosomático (IGS). Adicionalmente, se preservó tejido de gónada para llevar a cabo el proceso histológico y la tinción hematoxilina-eosina. Los resultados indicaron que el IHS y el IGS fueron afectados significativamente (P<0.05). El análisis histológico evidenció la presencia de machos maduros en abril, así como de octubre a noviembre, y para las hembras, se observó la presencia de organismos desarrollados en abril y de octubre a diciembre. Adicionalmente, se detectó la presencia de organismos en transición de hembra a macho. El análisis proximal mostró el valor máximo de grasa en abril, lo cual coincidió con el menor valor de humedad. El análisis de proporción mostró una significativa dominancia de machos. Los datos obtenidos en la presente investigación coadyuvarán en la implementación de programas de protección para la especie.ABSTRACTDespite the economic importance of sand bass, Paralabrax maculatofasciatus, little information regarding its reproductive aspects is known. In this study, gonadal maturity stage, biological indexes, proximate gonad composition and sex ratio proportion were determined. A total of 30 wild spotted sand bass were monthly obtained from March 2017 to February 2018. Organisms were measured, weighted and dissected in order to obtain the condition factor (K), hepatosomatic index (IHS) and gonadosomatic index (IGS). A small portion of gonad was preserved to perform the histological procedure, and stained with Harris´ hematoxilineosin technique. The results indicate that somatic indexes were significantly affected (P<0.05) in terms of IHS and IGS. Histological analysis showed the presence of ripe males in April and from October to November, and for females, the presence of developed organisms was observed in April and from October to December. Additionally, the presence of transitional organisms from female to male was observed. The proximate analysis showed the maximum crude fat value in April, which coincides with the lowest moisture value. Sex proportion showed a significant male dominance. These data provide valuable information for the development of protection programs to encourage a sustainable fishery of the species.

scholarly journals Morphoanatomy of Pangasionodon hypopthalmus Reared Under Controlled Photoperiod

2021 ◽  
Vol 934 (1) ◽  
pp. 012057
Author(s):  
Windarti ◽  
B Amin ◽  
A H Simarmata
Keyword(s):  
Gonadosomatic Index ◽  
Hepatosomatic Index ◽  
Maturity Stage ◽  
Fish Feed ◽  
Dark Condition ◽  
Growth Data ◽  
Commercial Fish ◽  
Natural Photoperiod ◽  
Reddish Brown Color ◽  
Photoperiod Control

Abstract Fish morphoanatomy is affected by environmental condition such as photoperiod duration. A research on the effects of shortened photoperiod on the morphoanatomy of Pangasionodon hypopthalmus has been conducted. There were 3 treatments applied, namely, 24 hours dark (24D), 18 hours dark (18D) and natural photoperiod (control). The fish, 8 cm total length (TL) and 4 gr body weight (BW) were reared in circular plastic tanks filled with 100 L freshwater and completed with aerators and circulation pumps, 30 fishes/tank. The fish was reared for 8 weeks and fed with commercial fish feed pellets, twice/day, at satiation. The dark condition was created by placing the tanks under dark tarp tents. Morphoanatomy data were studied by the end of experiment. Results shown that the survival of fish was 100%. The growth of fish reared in 24D and 18D was better, more than 20 cm TL and 85 gr BW, while that of the control was 18 cm TL and 72 gr BW. The condition factor as well as the liver condition of fish in all treatment was not different, it was around 1.2. The liver was reddish brown color, smooth and oily in which hepatosomatic index (HSI) value 0.023 in 24D; 0.027 in 18D and 0.048 in control. The visceralsonatic index (VSI) was 0.090 in 24D; 0.70 in 18D and 0.161 in control. In most of fishes reared in 24D and 18D, the gonad were in the 1st maturity stage (gonadosomatic index; GSI 0.0058 to 0.0068), while the gonad of some control fishes were in the 2nd maturity stage (GSI 0.0080). Data obtained shown that the morphoanatomical data (HSI, VSI and GSI) of the fish reared in lengthened dark were lower, but the growth data (TL and BW) was higher than those of the control, indicated that the fish reared in dark condition may allocated more energy for growing.

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