Variation in Growth Pattern Between Some Secondary Sexual Characters in Crabs (Decapoda Brachyura)

Hartnoll, Richard G.

doi:10.1163/156854074x00334

Cited by 330 publications

(367 citation statements)

References 10 publications

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“…The transitional phase in brachyurans involves morphological and morphometric changes which can be detected by inflections or discontinuities in series of linear or curvilinear relationships using bivariate analysis (HAEFNER 1990). For female crabs, abdomen width is the measurement which is most often used to detect the onset of sexual maturity from morphological criteria (HARTNOLL 1974, PINHEIRO & FRANSOZO 1993. However, to ascertain the size at sexual maturity, other criteria must be used, because morphometric maturity may not always correspond to functional maturity (WENNER et al 1974, OH & HARTNOLL 1999.…”

Section: Sizmentioning

confidence: 99%

“…Gonadal criteria (or physiological maturity) are also a potential indicator of size at maturity, and have been associated with allometric changes in abdomen width as the female crab matures (KNUDSEN 1960, HARTNOLL 1974, 1982, HAEFNER 1990. Therefore, the use of more than one method to determine size at maturity appears to be appropriate, particularly if these methods are to be used to stipulate the minimum legal size of commercially exploited species (HAEFNER 1990, ALUNNO-BRUSCIA & SAINTE-MARIE 1998, OVERTON & MACINTOSH 2002.…”

Section: Sizmentioning

confidence: 99%

“…For many brachyuran species, morphological changes in the female abdomen may occur abruptly (after the molt to puberty) or may take place progressively, after several molts (HARTNOLL 1974(HARTNOLL , 1982. In grapsoid crabs these abdominal changes are not obvious and the abdomen widths of mature and immature females overlap, which makes it difficult to determine the onset of maturity by means of morphometric methods (HARTNOLL 1965).…”

Section: Sizmentioning

confidence: 99%

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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: Sizmentioning

confidence: 99%

Section: Sizmentioning

confidence: 99%

Section: Sizmentioning

confidence: 99%

See 1 more Smart Citation

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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“…Smallest ovigerous females were distributed in the 50-60mm size class in this population. §500 After the puberty molt, brachyw-an crabs undergo major morphologic changes in the transition between the last young instar and the first adult stage, when secondary sexual characters are developed (HARTNOLL 1974(HARTNOLL , 1978. While some alterations are evident, e.g.…”

Section: Resultsmentioning

confidence: 99%

“…As mentioned by HARTNOLL (1969) and CHRISTY (1987), the attraction and mating in aquatic brachyurans involve visual, tactile and/or chemical stimuli. The results obtained by PINHEIRO & FRANSOZO (1999) show that visual attraction of females intensifies the courtship display of males.…”

Section: Resultsmentioning

confidence: 99%

Chromatic alteration in Arenaeus cribrarius (Lamarck) (Crustacea, Portunidae): an indicator of sexual maturity

Pinheiro

Taddei

2000

Rev. Bras. Zool.

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ABSTRACT. Some individuals of the species Arenaeus cribrarills (Lamarck, 1818) bear a characteristic pink abdomen, which is notably different Ii-OIn the usual white coloration. The incidence of this chromatic alteration was determined for a single population and its relation with other individual variables were examined. The individuals were monthly collected from May , 1991 to April, 1993, in Ubatuba, Sao Paulo, with the aid of a shrimp fi shelY boat provided with double-rig trawling nets. All specimens were sexed, measured (CW = carapace width), di stributed in 10-mm size classes and classified according to growth phase (juvenile and adult), molting condition and development stage of gonads. The occurrence of pink-colored morphs was also recorded. From a total of2,096 collected individuals, only 60 females (nine of those ovigerous) presented a pink-colored abdomen, which represents 2.9% of the whol e sample and 5.2% of the females. Almost all of them were inte1l110it individuals (96.6%) and 63.3% showed mature gonads. According to published data, size at the onset offunctional maturity in A. cribrarills females is around 60 mm CW, ti'om which the incidence of pink morphs and ovigerous crabs were recorded. The obtained results suggest that such a chromatic alteration is associated to sexual maturity in these females. This characteristi c may enhance the attraction potential for mating, shonly after the puberty molt. KEY WORDS . Brachyura , Portunidae, repro~ucti ol1 , coloration During the past few years, changes in the coloration patterns related to the breeding period of several animal species, and mainly its role in attraction for mating, have received the attention of many researchers . According to LUM-KONG

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Force and dominance in the agonistic behavior of the freshwater crabPotamon fluviatile

1995

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In decapods, no analysis has ever been conducted of the force exerted by chelae, and the role that strength plays in the establishment of hierarchies. For this purpose, a device was designed to measure the force produced by the major chela in the freshwater crab Potamon fluviatile, where dominance hierarchy and agonistic behavioral patterns have previously been analyzed. Experiments showed that only in the females is strength the main factor influencing the outcome of contests. In males chela size more than chela strength is used to settle conflicts, together with other nonphysiognomic characteristics, molding the aggressive state of one individual, such as its history, including isolation from conspecifics, and possibly hormone concentration and metabolic levels.

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Variation in Growth Pattern Between Some Secondary Sexual Characters in Crabs (Decapoda Brachyura)

Cited by 330 publications

References 10 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

Chromatic alteration in Arenaeus cribrarius (Lamarck) (Crustacea, Portunidae): an indicator of sexual maturity

Force and dominance in the agonistic behavior of the freshwater crabPotamon fluviatile

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