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33 results for “Freshwater leeches”
Figure 2 in Long forgotten record of a freshwater leech on Madagascar indicates a host-associated dispersal event from continental Africa
Figure 2. General view and labels of F. Sikora's sample of Placobdelloides multistriatus (N = 2), Andrahomana, Southern Madagascar (ZIN Hirudinea 2227). (a) Specimen No 1 (red arrow shows a rupture at the ventral side). (b) Specimen No 2. (c) Original label with locality and host data (handwritten by F. Sikora in 1899). (d) Example of the word 'Andrahomana' from a handwritten letter of F. Sikora, Fort Dauphin, 17 December 1900 (Breure 2015, fig. 55c). (e) Original label with collection number (handwritten by F. Sikora in 1899 or later). (f) Two examples of a crossed out letter 'N' from a handwritten letter of F. Sikora, Fort Dauphin, 17 December 1900 (Breure 2015, fig. 55b). (g) Secondary label containing species name with a question mark (most likely handwritten by V. Plotnikov in 1904). (h) Secondary label (most likely handwritten by E. Lukin in 1960s-1970s). Scale bar = 1.0 mm (a-b). Photos: Tatyana A. Eliseeva and Iya G. Tsiplenkina.
Figure 3 in Long forgotten record of a freshwater leech on Madagascar indicates a host-associated dispersal event from continental Africa
Figure 3. External morphology of a Placobdelloides multistriatus specimen from F. Sikora's sample, Andrahomana, Southern Madagascar (ZIN Hirudinea 2227: specimen No 2). (a) Dorsal view. (b) Ventral view. (c) Anterior region (dorsal view). Abbreviations: MO, mouth; AS, anterior sucker; PS, posterior sucker; MS, traces of the median light (aureate) stripe; mg, male gonopore; and fg, female gonopore. Body somites are indicated by roman numerals; symbols a1, a2, and a3 indicate the number of annulus. Scale bars = 1.0 mm (a-b) and 0.5 mm (c). Photos: Tatyana A. Eliseeva; graphics: Ivan N. Bolotov.
Figure 1 in Long forgotten record of a freshwater leech on Madagascar indicates a host-associated dispersal event from continental Africa
Figure 1. Range map of Placobdelloides multistriatus. The light red filling indicates country-level records from continental Africa and Western Asia (Oosthuizen 1979; Al-Safadi and El-Shimy 1993; Leslie et al. 2011); the red star indicates F. Sikora's record from Madagascar discussed herein. Map: Mikhail Y. Gofarov.
FIGURE 4. Helobdella atli n in A new freshwater leech species of Helobdella (Annelida: Glossiphoniidae) from central Mexico
FIGURE 4. Helobdella atli n. sp. from Totolcingo, Tlaxcala, Mexico. Scanning electron microphotography of the anterior part, showing nuchal scute.
FIGURE 3. Helobdella atli n in A new freshwater leech species of Helobdella (Annelida: Glossiphoniidae) from central Mexico
FIGURE 3. Helobdella atli n. sp. from Totolcingo, Tlaxcala, México. Scanning electron microphotography of posterior part, showing the position of anus.
FIGURE 5 in Freshwater leech (Annelida: Hirudinida) distribution in the Canadian Province of Newfoundland and Labrador and adjacent regions: check-list, new records, new pigmentation forms, and Pleistocene refugia
FIGURE 5. Pigmentation patterns in Newfoundland and Labrador Erpobdella punctata (Leidy) by PH. A–B, Site 7, C Sites 14–15, D, Sites 12, 13, 24; E, Site 10; F, Sites 1–2.
FIGURE 1 in Freshwater leech (Annelida: Hirudinida) distribution in the Canadian Province of Newfoundland and Labrador and adjacent regions: check-list, new records, new pigmentation forms, and Pleistocene refugia
FIGURE 1. Surveyed sites in Newfoundland and Labrador. Circles, 2004 survey sites (numbered); Squares, literature locations of Pawlowski (1948) and in part, Davies (1973). The site numbers correspond to Table 1.
FIGURE 6 in Freshwater leech (Annelida: Hirudinida) distribution in the Canadian Province of Newfoundland and Labrador and adjacent regions: check-list, new records, new pigmentation forms, and Pleistocene refugia
FIGURE 6. Erpobdella obscura (Verrill) from Grand river, Ontario. A–E, G: Drawings by Susan Laurie-Bourque of CMNA 1984–0689. F by Peter Frank using Kodachrome film in May 1988. A, Anterior, ventral view; B, Anterior, dorsal view; C, Closeup of seminal vesicle; D, Well-developed male and female gonopores located between annuli; E, Posterior dorsal view; F, Photographs of two preserved leeches comparing the two color variations (ringed form on left and normal form on right); G, Dorsal view of dissected reproductive organs. The right side of the testes and spermduct are omitted on the right side. Broken lines show cut ends of organs. a, atrium; ejd, ejaculatory duct; ep, epididymis; fg, female gonopores; mg, male gonopores; lft, large follicles of testisacs; t, testisac; mft, multifollicular testisacs; nc, nerve chord. Ganglia are numbered in Roman numerals.
FIGURE 4 in Freshwater leech (Annelida: Hirudinida) distribution in the Canadian Province of Newfoundland and Labrador and adjacent regions: check-list, new records, new pigmentation forms, and Pleistocene refugia
FIGURE 4. Distribution of the four widespread leech species. Circles, 2004 survey; squares, literature locations (Pawlowski 1948, Davies 1973); triangles, museum specimens. A, Glossiphonia elegans (Verrill); B, Helobdella modesta (Verrill); C, Erpobdella punctata (Leidy); D, Erpobdella obscura (Verrill).
FIGURE 2 in Freshwater leech (Annelida: Hirudinida) distribution in the Canadian Province of Newfoundland and Labrador and adjacent regions: check-list, new records, new pigmentation forms, and Pleistocene refugia
FIGURE 2. Photographs of selected Newfoundland and Labrador leeches. D was collected by Cecelia McGrath in 1982. A, Dorsal view of Glossiphonia elegans (Verrill), site 17; B, Dorsal view of Helobdella modesta (Verrill), site 12; C, Dorsal view of Theromyzon sp., site 6; D, Lateral view of Haemopis lateromaculata Mathers, showing the plain ventrum separated from the speckled dorsum by a lighter pattern on the side, CMNA 1982–0654; E, Dorsal view of Haemopis marmorata (Say), site 12; F, Closeup of anal protrusion of Haemopis marmorata, Site 12; G, Erpobdella punctata (Leidy) (normal pigmentation), site 7; H, Erpobdella obscura (Verrill) [normal pigmentation], site 21. Scale bars are in cm unless otherwise indicated.
FIGURE 7 in Freshwater leech (Annelida: Hirudinida) distribution in the Canadian Province of Newfoundland and Labrador and adjacent regions: check-list, new records, new pigmentation forms, and Pleistocene refugia
FIGURE 7. Pigmentation patterns of Erpobdella obscura (Verrill). A–F are illustrations by PH from Labrador and Newfoundland: A, Site 28; B, Sites 22, 23; C, Site 21; D, Site 29; E, Site 18; F, Site 7. G–J are microscope photographs of typical examples of ringed and mottled patterns of Erpobdella obscura (Verrill) from Newfoundland and Labrador compared to specimens from the Grand River, Ontario. Scale bars are in mm. G, closeup of midportion of ringed specimen from Newfoundland, CMNA 2006–0023. H, anterior portion of ringed specimen from Newfoundland, CMNA 2006– 0020. I, anterior portion of mottled specimen from Newfoundland, CMNA 2006–0018. J, closeup of midportion of mottled specimen from Newfoundland, CMCA2006–0018.
FIGURE 1 in Freshwater leeches (Annelida: Clitellata: Hirudinida) of the Czech Republic (Central Europe): check-list, new records, and remarks on species distributions
FIGURE 1. The geographical position of the Czech Republic in central Europe, including historical divisions within the country—Bohemia (Čechy) to the west, and Moravia (Morava) to the east.
FIGURE 3 in Freshwater leeches (Annelida: Clitellata: Hirudinida) of the Czech Republic (Central Europe): check-list, new records, and remarks on species distributions
FIGURE 3. The distribution of selected leech species (Annelida, Clitellata, Hirudinida: the families Hirudinidae and Erpobdellidae) in the Czech Republic recorded during the years 1998 through 2008, based upon published and unpublished records, and specimens collected during this study.
FIGURE 2 in Freshwater leeches (Annelida: Clitellata: Hirudinida) of the Czech Republic (Central Europe): check-list, new records, and remarks on species distributions
FIGURE 2. The distribution of selected leech species (Annelida, Clitellata, Hirudinida: the families Glossiphoniidae and Piscicolidae) in the Czech Republic recorded during the years 1998 through 2008, based upon published and unpublished records, and specimens collected during this study.
FIGURE 3 in Freshwater leech (Annelida: Hirudinida) distribution in the Canadian Province of Newfoundland and Labrador and adjacent regions: check-list, new records, new pigmentation forms, and Pleistocene refugia
FIGURE 3. Distribution of rare leeches. Circles, 2004 survey; squares, literature locations (Pawlowski 1948, Davies 1973); triangles, museum specimens. A, Alboglossiphonia heteroclita (Linnaeus); B, Theromyzon sp.; C, Haemopis marmorata (Say): circles and squares; Haemopis lateromaculata Mathers: triangles; D, Haemopis grandis (Verrill) and Erpobdella parva (Moore): both museum specimens found at the same site (Fox Island- see text).
Data - Leech removal is not the primary driver of basking behavior in a freshwater turtle
<p>Leaving the water to bask (usually in the sun) is a common behavior for many freshwater turtles, with some species also engaging in "nocturnal basking." Ectoparasite removal is an obvious hypothesis to explain nocturnal basking and has also been proposed as a key driver of diurnal basking. However, the efficacy of basking, day or night, to remove leeches has not been experimentally tested. Therefore, we examined the number of leeches that were removed from Krefft's river turtles (<i>Emydura macquarii krefftii</i>) after experimentally making turtles bask at a range of times of day, durations, and temperatures. Turtles had high initial leech loads, with a mean of 32.1 leeches per turtle. Diurnal basking under a heat lamp for 3 h at ~<span>28°C significantly reduced numbers of leeches relative to controls. In diurnal trials, 90.9% of turtles lost leeches (mean loss of 7.1 leeches per turtle), whereas basking for 30 mins under the same conditions was not effective (no turtles lost leeches, and all turtles were still visibly wet). Similarly, "nocturnal basking" at ~23°C for 3 h was not effective at removing leeches. Only 18% of turtles lost leeches (one turtle lost one leech and another lost four leeches). Diurnal basking outdoors under direct sunlight for 20 min (</span>mean temp = 34.5°C) resulted in a small reduction in leeches, with 50% of turtles losing leeches and an average loss of 0.7 leeches per turtle. These results indicate basking can remove leeches if temperatures are high or basking durations are long. However, it was only effective at unusually long basking durations in this system. Our data showed even the 20-min period was longer than 70.1% of natural diurnal basking events, many of which took place at cooler temperatures. Therefore, leech removal does not appear to be the purpose of the majority of basking events.</p>
Histopathological, Oxidative Stress, and DNA Damage Assessment in the Vas Deferens Tissue of the Freshwater Leech Erpobdella johanssoni (Johansson, 1927) Following BTEX Exposure
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Data - Leech removal is not the primary driver of basking behavior in a freshwater turtle
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FIGURE 5. Helobdella atli n in A new freshwater leech species of Helobdella (Annelida: Glossiphoniidae) from central Mexico
FIGURE 5. Helobdella atli n. sp. from Totolcingo, Tlaxcala, Mexico. Digestive system and testisacs.
FIGURE 6. Helobdella atli n in A new freshwater leech species of Helobdella (Annelida: Glossiphoniidae) from central Mexico
FIGURE 6. Helobdella atli n. sp. from Totolcingo, Tlaxcala, Mexico. Reproductive system.
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