Reproductive cycle and size-dependent spawning of female spiny lobsters (Panulirus japonicus) off Oshima Island, Tokyo, Japan

1997 ◽  
Vol 48 (8) ◽  
pp. 869 ◽  
Author(s):  
Megumi Minagawa
Keyword(s):  
Reproductive Biology ◽  
Reproductive Cycle ◽  
Logistic Model ◽  
Sexual Maturity ◽  
Carapace Length ◽  
Spiny Lobster ◽  
Spawning Season ◽  
Size Dependent ◽  
Spiny Lobsters ◽  
Panulirus Japonicus

Reproductive biology of the spiny lobster Panulirus japonicus was histologically examined by monthly sampling between March 1993 and September 1994 at Oshima Island, near Tokyo. P. japonicus had a well defined reproductive cycle. Yolk accumulation became manifest in February and ovaries grew rapidly in March. Females spawned from late April to mid August and were ovigerous to mid September. Of large females with a carapace length (CL) of ≥47 mm, 93% were estimated to spawn twice during the spawning season. Size at which 50% of females reached sexual maturity was estimated to be 41.8 mm CL, as calculated from a logistic model. Some individuals considered to be primiparous showed delayed vitellogenesis and were estimated to spawn only once during the season.

scholarly journals Reproductive biology of Penaeus kerathurus (Forskål, 1775) (Decapoda: Penaeidae) in the Sea of Marmara, Turkey

2021 ◽  
Vol 50 (1) ◽  
pp. 33-37
Author(s):  
Mukadder Arslan Ihsanoglu ◽  
Ismail Burak Daban ◽  
Ali Işmen ◽  
Koray Cabbar ◽  
Cahide Çiğdem Yığin
Keyword(s):  
Reproductive Biology ◽  
Sexual Maturity ◽  
Carapace Length ◽  
Gonadosomatic Index ◽  
Mediterranean Ecosystem ◽  
Sea Of Marmara ◽  
Important Species ◽  
Spawning Period ◽  
Male Ratio ◽  
First Reproduction

Abstract One of the economically important species is Penaeus kerathurus (Forskål, 1755), which is widespread in the Mediterranean ecosystem. This paper presents results of research on reproductive biology of Penaeus kerathurus in the Sea of Marmara. A total of 1404 specimens were dissected to determine the maturity stages, reproduction time, and length at first reproduction. The female-to-male ratio was 1:0.9. A high percentage of mature females was determined in April, May and July. Moreover, the value of the gonadosomatic index (GSI) decreased after July. The spawning period was observed between April and July, and its intensity increased in July. The carapace length at first sexual maturity was determined to be 39 mm.

scholarly journals Reproductive biology of Thamnodynastes hypoconia (Serpentes: Dipsadidae) in Brazilian subtemperate wetlands

2016 ◽  
Vol 88 (3 suppl) ◽  
pp. 1699-1709 ◽  
Author(s):  
MARLUCI M. REBELATO ◽  
GLÁUCIA M.F. PONTES ◽  
ALEXANDRO M. TOZETTI
Keyword(s):  
Body Size ◽  
Reproductive Success ◽  
Reproductive Biology ◽  
Reproductive Cycle ◽  
Related Species ◽  
Sexual Maturity ◽  
Late Summer ◽  
Abundant Species ◽  
Early Fall ◽  
Macroscopic Analysis

ABSTRACT This study aimed to describe the reproductive biology of populations of Thamnodynastes hypoconia in subtemperate wetlands based on macroscopic analyses of their gonads. We analyzed 101 specimens from the southernmost regions of Brazil. The males had a greater snout-vent length, but the females reached sexual maturity with a greater body size. The reproductive cycle of the females was seasonal, with secondary vitellogenesis occurring between the winter and spring (May-October). Based on macroscopic analysis of gonads, data suggests that males have a continuous reproductive cycle. Parturition occurs between the late summer and early fall (January-April). The clutch size ranged between 4 and 16 embryos and showed no relationship with the female's body size. The recorded reproductive frequency of T. hypoconia is low (38 %) compared to other phylogenetically related species. Conversely, the studied populations appear to have a high reproductive success because it is an abundant species in the study site.

Reproductive biology of the commercial sea cucumber Parastichopus californicus (Stimpson) (Echinodermata: Holothuroidea). I. Reproductive periodicity and spawning behavior

1986 ◽  
Vol 64 (1) ◽  
pp. 168-175 ◽  
Author(s):  
J. Lane Cameron ◽  
Peter V. Fankboner
Keyword(s):  
British Columbia ◽  
Reproductive Biology ◽  
Reproductive Cycle ◽  
Sea Cucumber ◽  
Late Spring ◽  
Spawning Season ◽  
Inland Waters ◽  
Spawning Behavior ◽  
Annual Reproductive Cycle

The commercial sea cucumber Parastichopus californicus (Stimpson) has an annual reproductive cycle, with spawning occurring in the late spring through summer within the inland waters of southwestern British Columbia, Canada. The sexes are separate and occur at a 1:1 ratio within the population studied. Ovarian and testicular tubules regenerate and proliferate preceding the spawning season each year. Spawning is partially synchronous and may be mediated by an increase in the intensity and duration of insolation.

scholarly journals Reproductive Biology of Bothrops erythromelas from the Brazilian Caatinga

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Verônica Alberto Barros ◽  
Claudio Augusto Rojas ◽  
Selma Maria Almeida-Santos
Keyword(s):  
Reproductive Biology ◽  
Intraspecific Variation ◽  
Reproductive Cycle ◽  
Environmental Conditions ◽  
Sexual Maturity ◽  
Extended Period ◽  
Sperm Storage ◽  
Early Summer ◽  
Reproductive Patterns ◽  
Phylogenetic Inertia

The reproductive biology of Bothrops erythromelas, a small pit viper from the Caatinga, a semiarid biome in Brazil, is described based on analysis of individuals deposited in zoological collections. Males are smaller and also attain sexual maturity at a smaller size than females. Female reproductive cycle is seasonal with an extended period of secondary vitellogenesis and births occurring in a restricted period from late spring to early summer. Sperm storage in females may probably occur in infundibular tubular glands and uterine muscular twisting (UMT), which is a polymorphic condition within B. erythromelas. Seasonal spermatogenesis in males is variable with some intraspecific variation regarding the male reproductive stage per season. Most males are reproductively active during spring/summer and reproductively quiescent during autumn/winter, although some individuals vary (e.g., show testicular spermatogenesis and active sexual segment of the kidneys (SSK) during winter). The SSK could be identified in every male. Most males showed highly hypertrophied SSK in spring/summer and moderately hypertrophied SSK in autumn/winter. The ampulla ductus deferentis was observed and histochemical reactions were conducted. We discuss the probable influence of the unique environmental conditions of the Caatinga region and phylogenetic inertia in the reproductive patterns of this snake species.

Reproductive biology of the slipper lobster Scyllarides deceptor (Decapoda: Scyllaridae) along the southern Brazilian coast

2008 ◽  
Vol 88 (7) ◽  
pp. 1433-1440 ◽  
Author(s):  
Gabriela Oliveira ◽  
Andrea S. Freire ◽  
Paulo R.K. Bertuol
Keyword(s):  
Reproductive Biology ◽  
Breeding Season ◽  
Sexual Maturity ◽  
Egg Size ◽  
Carapace Length ◽  
Sampling Period ◽  
Late Winter ◽  
Brazilian Coast ◽  
Rocky Bottom ◽  
Size At Sexual Maturity

The reproductive biology of Scyllarides deceptor was studied along the southern Brazilian coast (27°S 48°W) from December 2002 to December 2003. Samples were collected monthly at Xavier Island, where animals were caught and marked. Fecundity and egg size were estimated from ovigerous females caught also in two adjacent islands, Arvoredo and Aranhas. A total of 98 females was recorded at Xavier Island during the sampling period, 24 of these were recaptured and presented time-at-liberty ranging from 14 to 297 days. Ovigerous females were observed during spring and summer, with the moulting period lasting from late winter to spring. Size at sexual maturity was assessed from 66 females caught during the breeding season and estimated in 85.33 mm of carapace length (CL). Mean fecundity of S. deceptor was estimated in 191,262 eggs (±17,811, SE) for females, on average, 94.74 mm long (±1.86 mm SE) (CL). Fecundity was significantly related to CL (R2 = 0.90) Mean egg size was 0.67 mm (±0.005 mm SE) and did not correlate significantly to CL (P = 0.78). The rocky bottom of Xavier Island was favourable for reproduction, presenting shelter and foraging grounds for the ovigerous females. For management purposes, our results suggest the closure of the S. deceptor fishery from November to January and the capture-size of females to be restricted to animals larger than 90 mm (CL).

Sexual maturity, reproductive season and fecundity of the spiny lobster Panulirus penicillatus from the Gulf of Eilat (Aqaba), Red Sea

1993 ◽  
Vol 44 (4) ◽  
pp. 527 ◽  
Author(s):  
I Plaut
Keyword(s):  
Red Sea ◽  
Sexual Maturity ◽  
Field Data ◽  
Carapace Length ◽  
Spiny Lobster ◽  
Geographic Range ◽  
Reproductive Season ◽  
Geographic Isolation ◽  
Gonadal Index ◽  
Sexually Mature

Panulirus penicillatus Olivier (1791) (Decapoda: Palinuridae) is widely distributed in the Indian and Pacific Oceans and is the most common spiny lobster in the Red Sea. Female lobsters (n =234), were collected on four occasions in 1986 from the coral reef of Dahab, 110 km south of Eilat, Israel. Field data and the gonadal index indicated that the reproductive season was from February to October, during which the females spawned 2-4 times. In nature, females became sexually mature at a carapace length (CL) of 50 mm. This result was confirmed by morphometric analysis of the regression between pleopodal exopodite length and carapace length. The number of eggs per spawn (E) was related to CL by the equation E=2.715 ×(CL)2.581. The incubation period of eggs was 35.5�1.0 days (�s.d.) at temperatures of 24-27�C in the aquarium. The results are compared with data on P. penicillatus from other parts of its geographic range, and the effect of geographic isolation on reproduction is discussed.

The effect of steroid hormone feeds on the reproductive biology of the spiny lobster, Panulirus interruptus (J. W. Randall, 1840) (Decapoda, Palinura)

Crustaceana ◽  
2015 ◽  
Vol 88 (12-14) ◽  
pp. 1367-1386 ◽  
Author(s):  
Fan-Hua Nan ◽  
Yu-Sheng Wu ◽  
Nung-Chieh Chang
Keyword(s):  
Treatment Group ◽  
Steroid Hormones ◽  
Reproductive Biology ◽  
Steroid Hormone ◽  
Spiny Lobster ◽  
Control Group ◽  
Panulirus Interruptus ◽  
Spiny Lobsters

In this study, the effects of adding steroid hormones to the feeds administered to cultures of the spiny lobster, Panulirus interruptus (J. W. Randall, 1840), were investigated. The results indicate that the addition of steroid hormones in the feeds evoke (1) an increase in the ratio of ovigerous versus non-ovigerous females of up to 13.68% as compared to the controls; (2) fertilized females were present several months longer in the treatment group than in the control group; and (3) the ovigerous period, i.e., the time from fertilization until release of the young, was substantially shorter under a regime of feeding with steroid hormone additions. As a conclusion, enrichment of the feeds with steroid hormones thus distinctly increases the yield of young spiny lobsters in the course of a year cycle.

The spiny lobster, Jasus lalandei (H. Milne-Edwards), in South Australia. II. Reproduction

1964 ◽  
Vol 15 (2) ◽  
pp. 133 ◽  
Author(s):  
DR Fielder
Keyword(s):  
Reproductive Cycle ◽  
Sexual Maturity ◽  
Spiny Lobster ◽  
South Australia ◽  
Indirect Evidence ◽  
Ovarian Cycle ◽  
Microscopic Structure ◽  
Stages Of Development ◽  
Size At Sexual Maturity ◽  
Female Reproductive Cycle

The female reproductive cycle is described in detail. The ovarian cycle passes through seven stages of maturation, recognized by changes in macroscopic and microscopic structure. The presence of ovigerous setae in females has been used to estimate size at sexual maturity; these setae are developed fully only at the maturity moult. No stages of development could be described for the testis from macroscopic or microscopic examinations. The structure of the testis and the process of spermatogenesis are described and compared with results obtained by Matthews (1951) for Panulirus pencillatus (Oliver). No simple indication of sexual maturity was found for males, but an estimate was made using other, indirect, evidence.

Reproductive biology and sexual dimorphism of a high-altitude population of the viviparous lizard Phymaturus punae from the Andes in Argentina

2007 ◽  
Vol 28 (3) ◽  
pp. 427-432 ◽  
Author(s):  
Jorgelina Boretto ◽  
Juan Carlos Acosta ◽  
José Villavicencio ◽  
Graciela Blanco ◽  
José Marinero ◽  
...  
Keyword(s):  
Life History ◽  
Sexual Dimorphism ◽  
High Altitude ◽  
Reproductive Biology ◽  
Reproductive Cycle ◽  
Sexual Maturity ◽  
Cold Climates ◽  
Pregnant Females ◽  
Life History Data ◽  
The Andes

AbstractPhymaturus punae is a viviparous lizard endemic to the Provincial Reserve San Guillermo, San Juan (Argentina). We present the first life history data of P. punae, belonging to an interesting genus adapted to cold climates. Females reach sexual maturity at 80.6 mm, and males at 84.4 mm snout-vent length. There is sexual dimorphism represented by larger and more robust males, but females show a wider body and a proportionally greater interlimb length than males. In males, spermatozoa become abundant in both testes and epididymi in mid-summer. Vitellogenic and pregnant females occurred simultaneously in late spring and mid-summer indicating a biennial reproductive cycle.

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