EFFECTS OF SALINITY AND TEMPERATURE ON THE DEVELOPMENT OF EGGS IN THE TUBE BUILDING AMPHIPOD<i>COROPHIUM TRIAENONYX</i>STEBBING

Shyamasundari, K.

doi:10.2307/1540475

Cited by 19 publications

(9 citation statements)

References 13 publications

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“…Brood size of M. insidiosum in the Ebro Delta (mean 9.90, range 1-24 eggs) was higher than that reported from Monolimni Lagoon, Evros Delta (mean 4.96, range 1-16) by Kevrekidis (2004), Mazoma Lagoon (range 1-8) by Karakiri & Nicolaidou (1987), and similar to values reported for Arcachon (range 4-25) by Labourg (1968), Kysing Fjord, Denmark (range 4-21) by Muus (1967), and the Ionian Sea (mean 8.14, range 5-25) by Prato & Biandolino (2006b), but smaller than values reported under experimental conditions (range 5-40) by Nair & Anger (1979). Possibly, low salinities can give rise to high egg mortality (Shyamasundari, 1976;Fish & Mills, 1979;Kevrekidis, 2004).…”

Section: Monocorophium Insidiosumsupporting

confidence: 85%

The Gammaridea (Amphipoda) Fauna in a Mediterranean Coastal Lagoon: Considerations on Population Structure and Reproductive Biology

Delgado

Ribera

Guerao

2009

Crustac

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For two years, monthly samples were collected in Encanyissada coastal lagoon (Ebro Delta, N.W. Mediterranean Sea) to investigate certain aspects of the population structure and reproductive biology of the dominant species of amphipods. A total of 23 species of Gammaridea was collected, but only three species are frequent and abundant in the samples: Monocorophium insidiosum (Crawford, 1937), Gammarus aequicauda (Martynov, 1931), and Ericthonius brasiliensis (Dana, 1855). The abundance (CPUE) of all three species showed seasonal variation, with highs in autumnwinter and lows in summer, and with sex ratios favouring females. The breeding activity of M. insidiosum is high in winter and probably continuous throughout the year; brood size is related to the size of the female (range 1-36, mean value 10.2); total body length of ovigerous females ranged from 1.8 to 6.0 mm; the estimated growth rate was 14-43 μm d −1 . G. aequicauda is the most regular species in the samples; its estimated growth rate was 21-99 μm d −1 ; breeding activity is continuous throughout the year, and brood size was also related to female size (range 1-87, mean value 23.6); total body length of ovigerous females ranged from 5.0 to 12.0 mm. The breeding activity of E. brasiliensis is very similar to that shown by M. insidiosum; brood size was also related to female size, but the mean number of eggs is lower than in M. insidiosum (mean value 7.7, range 1-24); total body length of ovigerous females ranged from 1.7 to 5.6 mm; its estimated growth rate was 20-56 μm d −1 . RESUMENDurante dos años, se ha realizado un muestreo mensual en la laguna costera de la Encanyissada (Delta del Ebro, NO Mediterráneo) con la finalidad de investigar ciertos aspectos de la estructura poblacional y la biología reproductiva de las especies dominantes de anfípodos. Un total de 23 especies de Gammaridea fueron capturadas, pero sólo tres fueron frecuentes y abundantes en las muestras: Monocorophium insidiosum (Crawford, 1937), Gammarus aequicauda (Martynov, 1931) y Ericthonius brasiliensis (Dana, 1855). La abundancia (CPUE) de las tres especies muestra variación estacional, siendo máxima en otoño-invierno y mínima en verano. En las tres especies, las hembras son más abundantes que los machos. La actividad reproductora de M. insidiosum es alta en invierno y probablemente continua durante todo el año; el tamaño de la puesta está correlacionado con el tamaño de la hembra (rango 1-36; valor medio 10,2); la longitud total de las hembras ovígeras es de 1,8 a 6,0 mm; la tasa de crecimiento estimada para esta especie es de 14-43 μm d −1 . G. aequicauda es la especie más regular en las muestras; la tasa de crecimiento para esta especie es 21-99 μm d −1 ; la actividad reproductora es continua durante todo el año, y el tamaño de las puesta está relacionada con la talla de la hembra (rango 1-87, valor medio 23,6); la longitud de las hembras ovígeras es de 5,0 a 12,0 mm. La actividad reproductora de E. brasiliensis es similar a la de M. insidiosum; el tamaño de las puesta también es...

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Section: Monocorophium Insidiosumsupporting

confidence: 85%

The Gammaridea (Amphipoda) Fauna in a Mediterranean Coastal Lagoon: Considerations on Population Structure and Reproductive Biology

Delgado

Ribera

Guerao

2009

Crustac

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“…The high embryo loss in C. orientale might be a consequence of high embryo mortality due to low salinities occurred in Monolimni lagoon. Under laboratory conditions Shyamasundari (1976) observed that the embryos of Corophium triaenonyx developed only at salinities between 7.5 and 37.5 psu, although adults tolerated salinities between 0.6 and 59.8 psu; Mills & Fish (1980) found that very low percentages of embryos of C. volutator developed normally and hatched at 2 psu, of C. arenarium at 5 psu and of both species at 40 psu.…”

Section: Sexual Maturity Brooding and Fecunditymentioning

confidence: 99%

“…Incubation time, maturation time and longevity in various Corophium species, reported to vary between 6 and 39, 9 and 99 days, and up to about 12 months respectively, become shorter at high temperatures (see Cunha et al, 2000c, for references). Under laboratory conditions, Nair & Anger (1979) observed a decrease in life span, in the age and size at the time of attaining sexual maturity, and in incubation time of C. insidiosum with increasing temperature, while Shyamasundari (1976) found that incubation time in C. triaenonyx was prolonged at extreme salinities.…”

Section: Sexual Maturity Brooding and Fecunditymentioning

confidence: 99%

Life history, aspects of reproductive biology and production of Corophium orientale (Crustacea: Amphipoda) in Monolimni lagoon (Evros Delta, North Aegean Sea)

Kevrekidis

2005

Hydrobiologia

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Monthly samples of Corophium orientale were collected during February 1998-February 1999 in both parts of Monolimni lagoon (0.3 < Sal. < 6 psu, 2 < Temp. < 28.5°C). Corophium orientale showed a semiannual life cycle. In the southern part, breeding occurred from early spring to mid autumn having three peaks, in early spring, early summer and early autumn, and three cohorts were produced, a spring cohort, a summer cohort and an overwintering one. In the shallower innermost northern part of Monolimni lagoon, breeding peaked in mid-spring and, also, in early autumn, and two discrete cohorts, a spring and an overwintering one, were produced. A lack of large individuals, attributed to a temporary size -selective predation by migrating shorebirds, was observed during summer. That lack possibly contributed to the hiatus in reproduction. Photoperiod seemed to be a more important cue than temperature in the initiation of the reproductive cycle, while extremely low salinities (<1 psu) did not deter breeding. Females attained maturity at a smaller size in late spring and, especially, in summer than in early spring at lower temperatures. Brood size was a function of females' body size. Females, matured during summer at high temperatures, showed the lowest brood size, body length ratio. Mean brood size was small (12-13 early embryos) and embryo loss during development high (54%), possibly due to a negative effect of low salinities. A 1:1 sex ratio existed in the small body length classes, but females preponderated in the large ones. The spring cohort in the southern part, which developed at moderate temperatures, showed the highest growth rate (40 lm day )1 ). Secondary production of C. orientale calculated by Hynes's method gave a mean annual density of 4562.5 and 9327.6 ind. m )2 , a mean annual crop (B) of 1.03 and 2.67 g DW m )2 , an annual production (P) of 6.91 and 22.54 g DW m )2 and a P/B ratio of 6.7 and 8.4 in the northern and southern part of the lagoon, respectively.

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“…Reproductive delays have been demonstrated for L. plumulosus in response to sediment contamination (J.D. Farrar, unpublished data) and for other gammaridean amphipods as a result of manipulating temperature, salinity, and food ration [22–24]. If reproduction was delayed, we speculated that the brooding or embryo measures could be used as surrogates for measures of neonate production.…”

Section: Discussionmentioning

confidence: 99%

Selection of optimal measures of growth and reproduction for the sublethal Leptocheirus plumulosus sediment bioassay

Gray

Jr.

Brandon

et al. 1998

Enviro Toxic and Chemistry

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This article describes the selection process used to identify optimal measures of growth and reproduction for the proposed 28‐d sublethal sediment bioassay with the estuarine amphipod Leptocheirus plumulosus. We used four criteria (relevance of each measure to its respective endpoint, signal‐to‐noise ratio, redundancy relative to other measures of the same endpoint, and cost [i.e., of labor, training, and equipment]) to evaluate nine growth and seven reproductive measures. Optimal endpoint measures were identified as those receiving relatively high scores for all or most criteria. Measures of growth scored similarly on all criteria, except for cost. The cost of the pooled (female plus male) growth measures was substantially lower than the cost of the female and male growth measures because the latter required more labor (by approx. 25 min per replicate). Pooled dry weight was identified as the optimal growth measure over pooled length because the latter required additional labor and nonstandard software and equipment. Embryo and neonate measures of reproduction exhibited wide differences in labor costs but yielded similar scores for other criteria. In contrast, brooding measures of reproduction (females carrying embryos in the brood pouch) scored relatively low on endpoint relevance, signal‐to‐noise ratio, and redundancy criteria. We recommend neonates/survivor as the optimal measure of L. plumulosus reproduction because it exhibited high endpoint relevance and signal‐to‐noise ratios, was redundant to other reproductive measures, and required minimal time.

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EFFECTS OF SALINITY AND TEMPERATURE ON THE DEVELOPMENT OF EGGS IN THE TUBE BUILDING AMPHIPODCOROPHIUM TRIAENONYXSTEBBING

Cited by 19 publications

References 13 publications

The Gammaridea (Amphipoda) Fauna in a Mediterranean Coastal Lagoon: Considerations on Population Structure and Reproductive Biology

The Gammaridea (Amphipoda) Fauna in a Mediterranean Coastal Lagoon: Considerations on Population Structure and Reproductive Biology

Life history, aspects of reproductive biology and production of Corophium orientale (Crustacea: Amphipoda) in Monolimni lagoon (Evros Delta, North Aegean Sea)

Selection of optimal measures of growth and reproduction for the sublethal Leptocheirus plumulosus sediment bioassay

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