Endocrine Control of Reproduction in Decapod Crustacea

Adiyodi, K. G.; Adiyodi, Rita G.

doi:10.1111/j.1469-185x.1970.tb01627.x

Cited by 247 publications

(92 citation statements)

References 62 publications

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“…In brachyurans with indeterminate growth, i.e., which continue to molt after reaching the mature size (HARTNOLL 1985), the intervals between molts become longer and the molt increment decreases as the animal grows. In females these events are more evident due to the egg incubation period, which is an antagonistic event with growth (ADIYODI & ADIYODI 1970, FINGERMAN 1987. Moreover, the allocation of resources for somatic growth in immature individuals can differ from the somatic investment of adults, because the adults must allocate resources for reproductive purposes (TUOMI et al 1983).…”

Section: Discussionmentioning

confidence: 99%

Size at sexual maturity of female crabs Sesarma rectum Randall (Crustacea, Brachyura) and ontogenetic variations in the abdomen relative growth

Leme

2005

Rev. Bras. Zool.

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ABSTRACT. The aim of the present study was to ascertain the size at sexual maturity in females of the crab Sesarma rectum Randall, 1840 by comparing gonadal maturity to morphologic maturity (using abdomen-width data). The relative growth of the abdomen was analysed for all growth phases (for each 3-mm carapace width size class), and the slopes of the separate allometric relationships were compared through analysis of covariance (ANCOVA) from log e -transformed data to detect changes in the level of allometry during ontogeny. The physiological size at maturity (gonadal criteria) was determined through a logistic curve, indicating the size at which 50% of females presented mature gonads (M 50 = 17.4 mm CW). The highest allometric levels occurred in growth phases 2 and 3 (body sizes ranging from 15 to 21 mm CW), indicating faster growth of the abdomen during those phases. Phases 1 (< 15 mm CW) and 4 and 5 (size classes above 21 mm CW) showed isometric growth. In the study area, a mangrove on the northern coast of the state of São Paulo, Brazil, individuals of S. rectum began to reach sexual maturity from 15 mm CW onward, when the slopes of the relationship of abdomen width to carapace width became positively allometric, indicating a differential growth rate. A gradual decrease in the slope, tending to isometry, occurred during ontogeny, as the animals became larger (older).

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Section: Discussionmentioning

confidence: 99%

Size at sexual maturity of female crabs Sesarma rectum Randall (Crustacea, Brachyura) and ontogenetic variations in the abdomen relative growth

Leme

2005

Rev. Bras. Zool.

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“…The neurohormonal regulation of the molt cycle is affected by diverse external and internal factors, being temperature and photoperiod the most relevant ones among the first group, and age, sex, and gonad maturity the most important ones among the second group (HARTNOLL, 1982;LIPCIUS, 1985). The relationship between molting and maturation has been investigated endocrinological and physiological factors (DRACH, 1955;BLISS, 1966;ADIYODI & ADIYODI, 1970;ADIYODI, 1985;AIKEN 1969AIKEN , 1980CHANG, 1993).…”

Section: Introductionmentioning

confidence: 99%

Molt cycle of the natural population of Palaemonetes argentinus (Crustacea, Palaemonidae) from Los Padres Lagoon (Buenos Aires, Argentina)

Felix

Petriella

2003

Iheringia, Sér. Zool.

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The molt cycle of the natural population of Palaemonetes argentinus Nobili, 1901 from Los Padres Lagoon, Buenos Aires, Argentina, was studied in relation to age, sex, and environmental factors. A total of 1645 individuals (740 females, 539 males, and 366 juveniles) were collected and analyzed between December 1995 and December 1996. The results indicate that the sex ratio (males:females) remains around 1:1.4 throughout most of the year. The reproductive period extends from September until February (spring and summer), with maximum sexual activity in October and November. Two cohorts originated in the spring and in the summer were differentiated. Ovigerous females arrest their molt cycle during the intermolt period to restart it after oviposition. The duration of the intermolt period does not differ between adults and juveniles. Since the percentage of premolt individuals represents 60% of the total cycle, it was classified as a diecdysic cycle. Within the studied range of water temperatures, the observed variations in the span of the different stages, indicate that this factor does not alter the molt frequency. Like in the rest of decapods, the intermolt duration of P. argentinus is modified by ovarian maturation.

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“…These females have two main events that may slow or stop their somatic growth: part of their energy is directed to gonadal development and for the supply during egg laying (Warner, 1967;Díaz and Conde, 1989;Johnson, 2003) and they hardly feed during the egg incubation (Crane, 1975;Christy and Salmon, 1991). On the other hand, males can grow continuously attaining larger size for courtship purposes (Warner, 1967;Adiyodi and Adiyodi, 1970;Wenner, 1972;Christy and Salmon, 1984;Díaz and Conde, 1989;Henmi and Kaneto, 1989). This observation was also reported by Bedê et al (2008) in the population of U.…”

Section: Population Structure In Carapace Widthmentioning

confidence: 60%

Temporal distribution in the abundance of the fiddler crab Uca (Leptuca) uruguayensis Nobili, 1901 (Decapoda: Ocypodidae) from Garças River mangrove, Guaratuba Bay, southern Brazil

Martins

Masunari

2013

Nauplius

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Endocrine Control of Reproduction in Decapod Crustacea

Cited by 247 publications

References 62 publications

Size at sexual maturity of female crabs Sesarma rectum Randall (Crustacea, Brachyura) and ontogenetic variations in the abdomen relative growth

Size at sexual maturity of female crabs Sesarma rectum Randall (Crustacea, Brachyura) and ontogenetic variations in the abdomen relative growth

Molt cycle of the natural population of Palaemonetes argentinus (Crustacea, Palaemonidae) from Los Padres Lagoon (Buenos Aires, Argentina)

Temporal distribution in the abundance of the fiddler crab Uca (Leptuca) uruguayensis Nobili, 1901 (Decapoda: Ocypodidae) from Garças River mangrove, Guaratuba Bay, southern Brazil

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