The production of hemoglobin by small pond <i>Daphnia pulex</i>: intraspecific variation and its relation to habitat

Engle, Diana L.

doi:10.1111/j.1365-2427.1985.tb00233.x

Cited by 20 publications

(10 citation statements)

References 32 publications

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“…A similar phenomenon was observed for D. magna by Heisey & Porter (1977). Hemoglobin synthesis by Duphniu is common in ponds or lakes where oxygen is limited (Chandler, 1954;Prepas & Rigler, 1978;Engle, 1985). We found bright red Daphnia in the near bottom layer in Lake Yunoko during the summer stagnation.…”

Section: Discussionsupporting

confidence: 60%

Significance of a low oxygen layer for a Daphnia population in Lake Yunoko, Japan

1989

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Population dynamics and vertical migration of Daphnia longispina in Lake Yunoko were studied. The Daphnia population was small in spring and early summer, probably because of high predation pressure by fish. The population grew in midsummer, when thermal stratification developed and the dissolved oxygen became very low in the deeper layer of the hypolimnion. In this season, adults of D. Zongispina concentrated in the daytime near the lake bottom, where fish were absent because of the anoxic conditions, but ascended at night to the upper layer of the hypolimnion, where food was most abundant. The low oxygen layer near the bottom kept out the predators and protected Daphnia from predation, and consequently contributed to the built-up of its population. However, the low oxygen layer was unfavorable for reproduction of Daphnia, as reflected in the low egg ratio and high percentage of males in the population. The population decreased in the fall, when thermal stratification disappeared and predation pressure seemed to increase.

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Section: Discussionsupporting

confidence: 60%

Significance of a low oxygen layer for a Daphnia population in Lake Yunoko, Japan

1989

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“…An increase in hemoglobin concentration improves the physiological performance of red animals exposed to hypoxia (Kobayashi and Gonoi 1985;Pirow et al 2001). Nevertheless, in well-oxygenated water, cladocerans do not synthesize hemoglobin since it incurs energy cost, plus red pigmentation would increase the likelihood of visual predation (Brooks and Dodson 1965;Engle 1985;Nebcker et al 1992). Furthermore, hemoglobin synthesis demands time (Zeis et al 2002) and in Lake Hayq pale cladocerans probably failed to synthesize hemoglobin swiftly.…”

Section: Discussionmentioning

confidence: 94%

Zooplankton community structure and ecology of the tropical-highland Lake Hayq, Ethiopia

2011

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a b s t r a c tLake Hayq, a highland lake in Ethiopia, was stocked with Tilapia fish (Oreochromis niloticus) in late 1970s, offering an opportunity to study the effect of fish predation in a natural lake. Since 1930s, some limnological surveys have been done sporadically documenting a change in zooplankton composition including the disappearance of cladocerans, hypothesizing the stocked planktivorous fish could be a cause. Nevertheless, no detailed research was conducted to identify potential effects of fish stocking predominantly due to its remote location. The article presents data about zooplankton composition, abundance and biomass done between October 2007 and January 2009 on short-time intervals including the underlying limnological variables. The zooplankton community was depauperate comprising two copepods, three cladocerans, and six rotifers taxa, as typical for tropical lakes. Total mean standing biomass of all crustacean zooplankton was 237 mg dry mass m −3 , which gave Lake Hayq an intermediate position when compared with other tropical lakes. Of copepods, Thermocyclops ethiopiensis was almost an exclusive species, and its temporal variation was influenced by food supply and water temperature. We refute the hypothesis that Tilapia was the cause for the seasonal disappearance of cladocerans, and attribute it to the adverse effect of episodic mixing. Nevertheless, the planktivorous fish probably plays a key role in structuring the cladocerans in particular the large-sized Daphnia magna. In January 2008, we observed a massive planktivorous fish mortality that triggered high algal biomass, which was later grazed by large-sized D. magna demonstrating the trophic cascade hypothesis in a natural ecosystem.

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“…Some invertebrates have adaptations that enable them to survive low oxygen concentrations. Certain cladocera species are able to increase their production of hemoglobin if available oxygen levels decline (Engle 1985). Other responses include decreasing locomotor activity and feeding rates and limiting energy output for reproduction.…”

Section: Discussionmentioning

confidence: 99%

Nektonic invertebrate abundance and distribution at the emergent vegetation-open water interface in the Delta Marsh, Manitoba, Canada

Murkin

Titman

1992

Wetlands

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Water temperatures were constant across the interface through much of the year. By mid-summer, hypoxic conditions prevailed within the water column in the cattail stand. Algae levels were similar across the interface throughout much of the year, with peaks occurring just inside the interface in June and July. Early in the season, there was a trend for higher nektonic invertebrate numbers within the cattail stands of both bays. By late August, there were similar total invertebrate numbers across the interface. Cladocera and ostracod numbers were higher within the cattail stands during June and July; during the same periods, corixid levels were higher in the open water sites. The low oxygen levels within the cattail stands during the summer may reduce predation by fish and other predators that cannot tolerate low oxygen levels. This may explain the higher numbers of prey species like cladocerans and ostracods within the cattail stands during mid-summer. The presence of algal or detrital food resources seemed to have little influence on invertebrate abundance across the interface during this study. Peaks in invertebrate abundance did not occur at the emergent vegetation-open water interface during any of the sampling periods in this study. The high invertebrate diversity and abundance in interspersed wetland habitat may be related more to the mixture of habitat types rather than the amount of interface present.

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The production of hemoglobin by small pond Daphnia pulex: intraspecific variation and its relation to habitat

Cited by 20 publications

References 32 publications

Significance of a low oxygen layer for a Daphnia population in Lake Yunoko, Japan

Significance of a low oxygen layer for a Daphnia population in Lake Yunoko, Japan

Zooplankton community structure and ecology of the tropical-highland Lake Hayq, Ethiopia

Nektonic invertebrate abundance and distribution at the emergent vegetation-open water interface in the Delta Marsh, Manitoba, Canada

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