The Life Histories of Two Temporarily Coexisting, Pond Dwelling Cladocerans

Maier, Gerhard

doi:10.1002/iroh.19930780109

Cited by 13 publications

(4 citation statements)

References 20 publications

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“…However, temperate taxa are less sensitive to low food levels than tropical taxa. The rate of population increase is yet another important variable affected by temperature and food level as well as their interaction (Maier, 1993). In tropical species population (2002) and Nandini & Sarma (2000) Ceriodaphnia cornuta 13-25 Nandini (2000) and…”

Section: Patterns Of Survivorship Offspring Production and Growth Rmentioning

confidence: 99%

Life history strategies of cladocerans: comparisons of tropical and temperate taxa

2005

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We review recent works on different life history variables of cladoceran taxa in tropical and temperate freshwater bodies, comparing the strategies that cladocerans have evolved to adapt to contrasting environmental conditions in the two geographical regions. These life-history parameters relate to age and size at maturity, survival, fecundity, life-expectancy at birth, lifespan, gross, and net reproductive rates, generation time, the rate of population increase, peak population density and day of peak abundance. We also discuss the role of photoperiod and temperature on some of these life history parameters. We found a general paucity of experimental work and field data in tropics on cladocerans. There is very limited information on the few Daphnia species found in the tropics. The misconception of low species diversity of cladocerans in the tropics arose due to several reasons including lack of extensive and intensive field collections. Higher water temperatures apparently promote permanent infestation of tropical waters with toxic cyanobacteria, which reduce the zooplankton diversity. In addition to higher temperatures in the tropics, the year-round high predation pressure of planktivorous fish probably causes the tropical species, particularly in pelagic habitats, to reach maturity earlier (<3 days) than in temperate regions. Species of Daphnia in temperate regions are particularly adapted to living at food concentrations that are much lower and seasonably more variable than those for tropical genera such as Diaphanosoma. This is further corroborated by the more than an order of magnitude higher threshold food concentration (TFC) for tropical Cladocera than for their temperate counterparts. Fecundity patterns differ between tropical and temperate cladoceran taxa: cultured under optimal temperature regimes, tropical taxa have fewer eggs than temperate species of a comparable body size. Predation pressure may act differently depending on the size of the cladoceran neonates and thus on their population size structure. Global warming and climate changes seem to affect the behaviour (migration), distribution, and abundance of cladocerans. Apparently, in direct response to these changes, the possibility of encountering the tropical cladocerans in the northern, temperate hemisphere (bioinvasions) is on the rise.

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Section: Patterns Of Survivorship Offspring Production and Growth Rmentioning

confidence: 99%

Life history strategies of cladocerans: comparisons of tropical and temperate taxa

2005

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“…Cladoceran reaction to hunger also differs. Moina may withstand hunger for one day but not three days [82]. After 24 hours of malnutrition on Artemia, (DHA) contents might be less than half of their starting value.…”

Section: Responses Of Zooplankton Towards Alteration Of Living Condit...mentioning

confidence: 99%

A Review on Different Zooplankton Culturing Techniques and Common Problems Associated with Declining Density

Rahman

Azani

Suhaimi

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Zooplankton are primary consumers and serves as a crucial connection between primary producers and consumers in the aquatic food chain and higher consumers. Plankton is consumed by more than 75% of fish species at some point throughout their life. Supply of live feed cultures is critical to the expansion of aquaculture enterprises, particularly the larviculture sector, which generates fish and crustacean seeds for grow-out businesses. However, zooplankton is rarely farmed in high enough densities to be commercially viable on a large scale. This is owing to dynamic changes in physicochemical conditions in the culture system, which would normally result in a shift in the reproduction pathway from parthenogenetic to sexual, which creates resting eggs and reduces overall live feed output. The density of these live feed organisms can alter in response to environmental conditions such as eutrophication due to an excess of nutrients, acidification, pollution, salinity intrusion, and other factors that occur within the system. The water quality and food supply in the system have a big impact on zooplankton population dynamics, especially in a culture environment. The goal of this review is to have a better understanding of the many strategies for growing zooplankton utilizing various fertilization methods in order to maintain a constant population density. This review focusing on the density of zooplankton, the biological responses of live feed to fertilization, and common challenges that farmers face in the culture. In particular, we (i) examine the many zooplankton culture techniques that have been developed over time, (ii) explain the biological reactions of zooplankton to changes in culture conditions, and (iii) show the frequent issues as-sociated with live feed culture.

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“…However, temperate taxa are less sensitive to low food levels than tropical taxa. The rate of population increase is yet another important variable affected by temperature and food level as well as their interaction (Maier, 1993). In tropical species population (2002) and Ceriodaphnia cornuta 13-25 Nandini (2000) and…”

Section: Patterns Of Survivorship Offspring Production and Growth Rmentioning

confidence: 99%

Aquatic Biodiversity II

Segers¹,

Martens²

2005

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The Life Histories of Two Temporarily Coexisting, Pond Dwelling Cladocerans

Cited by 13 publications

References 20 publications

Life history strategies of cladocerans: comparisons of tropical and temperate taxa

Life history strategies of cladocerans: comparisons of tropical and temperate taxa

A Review on Different Zooplankton Culturing Techniques and Common Problems Associated with Declining Density

Aquatic Biodiversity II

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