Differential survivorship, reproduction, growth and nutrient allocation in the regular echinoid Lytechinus variegatus (Lamarck) fed natural diets

Beddingfield, Steven D.; McClintock, James B.

doi:10.1016/s0022-0981(97)00247-5

Cited by 50 publications

(28 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Further, it is likely that such cues will only induce spawning and behavioral responses in small groups within a population. Asynchronous oocyte distributions among ripe females (Beddingfield & McClintock 1998, McCarthy & Young 2002 …”

Section: Discussionmentioning

confidence: 99%

Effects of water-borne gametes on the aggregation behavior of Lytechinus variegatus

McCarthy¹,

Young²

2004

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 99%

Effects of water-borne gametes on the aggregation behavior of Lytechinus variegatus

McCarthy¹,

Young²

2004

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

show abstract

“…Feeding trials were conducted at 9 weeks, broadly following Beddingfield and McClintock (1998). Twenty-one specimens from each treatment were placed in individual open circular chambers supplied with FSW from the appropriate header tanks.…”

Section: Feeding Trialsmentioning

confidence: 99%

Urchins in a high CO2 world: partitioned effects of body-size, ocean warming and acidification on metabolic rate

Carey

Harianto

Byrne

2016

Journal of Experimental Biology

View full text Add to dashboard Cite

Body size and temperature are the major factors explaining metabolic rate, and the additional factor of pH is a major driver at the biochemical level. These three factors have frequently been found to interact, complicating the formulation of broad models predicting metabolic rates and hence ecological functioning. In this first study of the effects of warming and ocean acidification, and their potential interaction, on metabolic rate across a broad range in body size (two to three orders of magnitude difference in body mass), we addressed the impact of climate change on the sea urchin Heliocidaris erythrogramma in context with climate projections for southeast Australia, an ocean warming hotspot. Urchins were gradually introduced to two temperatures (18 and 23°C) and two pH levels (7.5 and 8.0), at which they were maintained for 2 months. Identical experimental trials separated by several weeks validated the fact that a new physiological steady state had been reached, otherwise known as acclimation. The relationship between body size, temperature and acidification on the metabolic rate of H. erythrogramma was strikingly stable. Both stressors caused increases in metabolic rate: 20% for temperature and 19% for pH. Combined effects were additive: a 44% increase in metabolism. Body size had a highly stable relationship with metabolic rate regardless of temperature or pH. None of these diverse drivers of metabolism interacted or modulated the effects of the others, highlighting the partitioned nature of how each influences metabolic rate, and the importance of achieving a full acclimation state. Despite these increases in energetic demand there was very limited capacity for compensatory modulating of feeding rate; food consumption increased only in the very smallest specimens, and only in response to temperature, and not pH. Our data show that warming, acidification and body size all substantially affect metabolism and are highly consistent and partitioned in their effects, and for H. erythrogramma, near-future climate change will incur a substantial energetic cost.

show abstract

“…This natural variation in oocyte size distribution could be caused by differences in local food availability. Beddingfield & McClintock (1998, 2000 suggested that local differences in food availability were responsible for reproductive variability observed in populations of Lytechinus variegatus in St. Joseph's Bay, Florida. However, this seems unlikely, even considering the prodigious grazing abilities of these sea urchins (Camp et al 1973, Garnick 1978, Vadas et al 1986, Valentine & Heck 1991, as seagrass was always abundant and fairly uniform at the study sites.…”

Section: Reproductive Periodicitymentioning

confidence: 99%

Gametogenesis and reproductive behavior in the echinoid Lytechinus variegatus

McCarthy

Young²

2002

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Gametogenesis and behavior facilitating reproduction were studied in the echinoid Lytechinus variegatus (Lamark 1816), found off Key Biscayne, Florida, during 1993. Oocyte diameters and qualitative staging of gonad sections indicated a sustained peak in reproductive state from April to June followed by a decrease in reproductive state by August and a shorter reproductive peak by November. Ripe females censused during both reproductive seasons showed substantial variation in oocyte size suggesting that sporadic, small scale spawning events commonly occur in this population. Counts of urchins in nested quadrats showed that L. variegatus aggregates at no fewer than 4 different spatial scales (0.0625, 0.25, 1.0 , and 2.0 m 2 ) with aggregations at larger scales being most common, especially prior to reproductive seasons. A noticeably higher amount of food in guts at these times suggests that these aggregations may be formed during random encounters during periods of increased feeding activity, which may also build up energy reserves for reproduction. Marked urchins were arranged in artificial aggregations of various sizes to investigate potential reproductive interactions. Most urchins moved 1 to 3 m d -1 throughout the year. Most encounters among urchins were of short duration and occurred randomly. Urchins placed in the largest aggregations dispersed most slowly during April and June, the periods with the highest mean oocyte diameters. The incidence of heterosexual pairing among naturally occurring pairs of urchins was random, suggesting that L. variegatus may not be able to distinguish gender. Sex ratio of the population was skewed in favor of males. The data suggest that numerous small scale spawning events take place during an extended reproductive season and that intraspecific encounters occur during this season entirely by chance. This method of spawning may enhance outcrossing.

show abstract

Differential survivorship, reproduction, growth and nutrient allocation in the regular echinoid Lytechinus variegatus (Lamarck) fed natural diets

Cited by 50 publications

References 40 publications

Effects of water-borne gametes on the aggregation behavior of Lytechinus variegatus

Effects of water-borne gametes on the aggregation behavior of Lytechinus variegatus

Urchins in a high CO2 world: partitioned effects of body-size, ocean warming and acidification on metabolic rate

Gametogenesis and reproductive behavior in the echinoid Lytechinus variegatus

Contact Info

Product

Resources

About