Results 131 to 140 of about 465 (167)
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American Midland Naturalist, 1987
Rates of encounter with sedentary and active prey vary with a preda- tor's activity level. Experiments were conducted to determine whether observed changes in the diet of Nephelopsis obscura Verrill (Hirudinoidea:Erpobdellidae) could be attributed to reduced activity levels when hunger level is reduced. Activity levels of leeches were recorded for 1 hr
B. Anholt, R. Davies
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Rates of encounter with sedentary and active prey vary with a preda- tor's activity level. Experiments were conducted to determine whether observed changes in the diet of Nephelopsis obscura Verrill (Hirudinoidea:Erpobdellidae) could be attributed to reduced activity levels when hunger level is reduced. Activity levels of leeches were recorded for 1 hr
B. Anholt, R. Davies
exaly +3 more sources
Gamete Research, 1988 AbstractThe mature sperm of Dina lineata is of the modified type. The sperm are 48 μm long and 0.3 μm wide. The sperm are filiform and helicoidal cells with a distinct head, a midpiece, and a tail. There are two distinct regions in the head: the acrosome and the posterior acrosome, each with its own characteristic morphology.
S, Bonet, M, Molinas
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Mitochondrial DNA Part A, 2014
Erpobdella octoculata (Linnaeus, 1758; Hirudinea: Arhynchobdellida: Erpobdellidae) is a very common and morphologically variable macrophagous predators of aquatic invertebrates. Here we determined the complete mitochondrial DNA (mtDNA) sequence of this species, as the first representative of the suborder Erpobdelliformes.
Yun-Ling Xu, J. Nie
semanticscholar +3 more sources
Erpobdella octoculata (Linnaeus, 1758; Hirudinea: Arhynchobdellida: Erpobdellidae) is a very common and morphologically variable macrophagous predators of aquatic invertebrates. Here we determined the complete mitochondrial DNA (mtDNA) sequence of this species, as the first representative of the suborder Erpobdelliformes.
Yun-Ling Xu, J. Nie
semanticscholar +3 more sources
Phylogeny of the leech family Erpobdellidae (Hirudinida : Oligochaeta)
Invertebrate Taxonomy, 2002The phylogenetic relationships of the family Erpobdellidae, a group of non-sanguivorous leeches useful as bioindicators, were investigated with the combined use of morphological characters, mitochondrial cytochrome c oxidase subunit I, mitochondrial 12S rDNA and nuclear 18S rDNA.
M. Siddall
semanticscholar +2 more sources
Species delimitation recovers undescribed Erpobdellidae (Annelida: Hirudinea) from USA and Trkiye.
ZootaxaErpobdellid leeches are morphologically similar to each other and thus cause confusion in taxonomic identification. In particular, annuli, colour and eye patterns are very close across species which creates difficulties in external morphological ...
N. Sağlam +2 more
semanticscholar +3 more sources
Functional Ecology, 1996
1. The hypotheses tested were that foraging behavioural responses (number of meals consumed, the number of encounters with prey and feeding time) and activity (swimming time) of the freshwater predatory leech Nephelopsis obscura were higher in the dark than in the light, increased with the size of the predator and increased with the length of the ...
L R Linton
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1. The hypotheses tested were that foraging behavioural responses (number of meals consumed, the number of encounters with prey and feeding time) and activity (swimming time) of the freshwater predatory leech Nephelopsis obscura were higher in the dark than in the light, increased with the size of the predator and increased with the length of the ...
L R Linton
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A cave leech (Hirudinea, Erpobdellidae) from Croatia with unique morphological features
Zoologica Scripta, 2001Croatobranchus mestrovi is a troglobitic leech from deep shaft‐like caves in the Velebit Mountain, Dinaric karst, Croatia, living in cold (4–6 °C) water. Its oral sucker extends to form four pairs of triangular tentacles, each with about five finger‐like papillae, but widening into a marginally crenulated disc when attached to a substrate.
B. Šket +5 more
semanticscholar +4 more sources
A Circadian Rhythm of Swimming Behavior in a Predatory Leech of the Family Erpobdellidae
American Midland Naturalist, 1997A wide variety of organisms exhibit circadian rhythms of motor behavior. These daily rhythms are advantageous because they allow animals to synchronize their activ- ities with predictable changes in the environment, including daily fluctuations of light, tem- perature and prey availability.
J. Angstadt, W. H. Moore
semanticscholar +2 more sources
Mites (Acarina: Astigmata) associated with adult freshwater leeches (Hirudinea: Erpobdellidae)
Journal of Natural History, 1997 Two species of mites (Astigmata: Acarina) were found crawling on the integument of cultured Nephelopsis obscura, a common North American leech. This is the first record of an association between mites and adult annelids. Histiostoma anguillarum (Histiostomatidae), previously described as an associate of farmed freshwater eels, were recorded in ...
Proctor, Heather, Gray, H., Oconnor, B.
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Journal of Animal Ecology, 1982
SUMMARY (1) A population of the erpobdellid leech Erpobdella octoculata (L.) was studied over a period of 16 months in the organically polluted River Ely, South Wales. The life cycle was completed in one year. (2) Seasonal patterns of mortality were apparently related to flow, temperature and life-cycle stage.
M A Learner
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SUMMARY (1) A population of the erpobdellid leech Erpobdella octoculata (L.) was studied over a period of 16 months in the organically polluted River Ely, South Wales. The life cycle was completed in one year. (2) Seasonal patterns of mortality were apparently related to flow, temperature and life-cycle stage.
M A Learner
exaly +2 more sources