Haidadinium ichthyophilum gen.nov. et sp.nov. (Phytodiniales, Dinophyceae), a freshwater ectoparasite on stickleback (Gastetosteus aculeatus) from the Queen Charlotte Islands, Canada

1997 ◽  
Vol 75 (11) ◽  
pp. 1936-1940 ◽  
Author(s):  
J. Buckland-Nicks ◽  
D. J. Garbary ◽  
T. E. Reimchen
Keyword(s):  
Life History ◽  
Gasterosteus Aculeatus ◽  
New Genus ◽  
Threespine Stickleback ◽  
Epithelial Hyperplasia ◽  
Fish Kills ◽  
Life History Stages ◽  
Queen Charlotte Islands ◽  
The Family ◽  
Complex Life History

The dinoflagellate Haidadinium ichthyophilum gen.nov. et sp.nov. is associated with the threespine stickleback, Gasterosteus aculeatus L., in freshwater. This new genus differs from all previously described dinoflagellates in the morphology and ultrastructure of its complex life history stages and in the ecology of its interaction with G. aculeatus. Distinguishing characters included (i) the absence of thecal plates and the occurrence of chloroplastes in the short-lived swarmer (=dinospore) stage; (ii) the development of four distinct amoeboid stages including a spheroidal, rolling amoeba unknown in any other species; and (iii) the fact that this dinoflagellate causes epithelial hyperplasia in the stickleback and does not result in massive fish kills. Haidadinium ichthyophilum is known only from two acidic lakes in the Queen Charlotte Islands, British Columbia, Canada. Haidadinium is tentatively assigned to the family Phytodiniaceae of the order Phytodiniales. Key words: dinoflagellates, Dinophyceae, Gasterosteus, Haidadinium ichthyophilum gen.nov. et sp.nov., Queen Charlotte Islands, Phytodiniales, symbiosis, taxonomy, ultrastructure.

Observations on the Life History of Ælurostrongylus abstrusus (Railliet), the Lungworm of the Cat

1927 ◽  
Vol 5 (2) ◽  
pp. 55-66 ◽  
Author(s):  
Thomas W. M. Cameron
Keyword(s):  
Life History ◽  
New Genus ◽  
Aelurostrongylus Abstrusus ◽  
The Family ◽  
History Of

A Preliminary outline of the life history of the lungworm of the cat and its confusion with that of Ollulanus tricuspis, has been given in a previous paper. Since that paper was published, the name of the family of lungworms has been changed to Protostrongylidæ by Professor Leiper; and an examination of adults of the lungworm from the cat, shewed that it belonged to a different genus from the type of the old genus Synthetocaulus. To this new genus, the name ælurostrongylus has been given.

Multivariate differentiation of parapatric and allopatric populations of threespine stickleback in the Sangan River watershed, Queen Charlotte Islands

1985 ◽  
Vol 63 (12) ◽  
pp. 2944-2951 ◽  
Author(s):  
T. E. Reimchen ◽  
E. M. Stinson ◽  
J. S. Nelson
Keyword(s):  
Discriminant Analysis ◽  
Reproductive Isolation ◽  
Gasterosteus Aculeatus ◽  
River System ◽  
Threespine Stickleback ◽  
Geographical Distance ◽  
Marine Waters ◽  
Meristic Characters ◽  
Allopatric Populations ◽  
Queen Charlotte Islands

A discriminant analysis was made of 17 morphometric and 10 meristic characters in the freshwater form (leiurus) of threespine stickleback (Gasterosteus aculeatus) from 16 localities in the Sangan River System on the Queen Charlotte archipelago and in the presumed ancestral form (trachurus) from a nearby locality in marine waters. While multivariate means were significantly different between trachurus and leiurus, there was even greater differentiation between the leiurus populations found in lakes, ponds, and streams, divergence which was independent of geographical distance between localities. Statistical removal of meristics, removal of body length, log transformation and size standardization of all morphometries did not substantially alter the discrimination of the populations. Two of the leiurus populations that overlap in a narrow zone appear to have achieved reproductive isolation.

A new genus and three new species of Termitophilous Aderidae (Coleoptera) from Australia, Papua New Guinea and the Philippines, with notes on their biology

1990 ◽  
Vol 4 (3) ◽  
pp. 643 ◽  
Author(s):  
JF Lawrence ◽  
DH Kistner ◽  
JM Pasteels
Keyword(s):  
Life History ◽  
New Species ◽  
Papua New Guinea ◽  
Feeding Behaviour ◽  
New Genus ◽  
New Guinea ◽  
The Philippines ◽  
The Family ◽  
Three New Species

Megaxenus Lawence, gen. nov., includes one speciesfrom North Queensland (M. Termitophilus Lawence, sp. nov.) and two from Papua New Guinea (M. bioculatus Lawence, sp. nov. and M. papuensis Lawence, sp. nov.). All three are found in the nests of Microcerotermes species and are the first known termitophiles in the family Aderidae. Notes on the behaviour and life history demonstrate that the larvae are integrated into the termite society, and are incorporated into the trophallactic feeding behaviour of termites, while the adults are actively persecuted by the termites but survive at the edges of the nest because of the webs constructed by the larvae prior to pupation.

The Nymphomyiidae (Diptera), with special reference to Palaeodipteron walkeri Ide and its larva in Quebec, and a description of a new genus and species from India

1970 ◽  
Vol 48 (1) ◽  
pp. 1-24 ◽  
Author(s):  
Felicity E. A. Cutten ◽  
D. Keith McE. Kevan
Keyword(s):  
Life History ◽  
Special Reference ◽  
New Genus ◽  
New Records ◽  
Systematic Position ◽  
Eastern Himalaya ◽  
New Genus And Species ◽  
The Family ◽  
History Of

The literature on the two described species of Nymphomyiidae, Nymphomyia alba Tokunaga and Palaeodipteron walkeri Ide, is reviewed. Previous opinions on the systematic position of the family and what is known or surmised about their biology are outlined. The occurrence of P. walkeri in Canada is discussed and new records are given from a small upland stream in western Quebec. The larvae of Nymphomyiidae were previously unknown, but those of P. walkeri have been discovered. It is confirmed that they are aquatic. Details of habitat of P. walkeri are given, and the larva is described and figured in detail. An outline of the probable bivoltine life history of this species and some further considerations regarding the relationships of the Nymphomyiidae are also made. An appendix makes additional comments on P. walkeri adults and the opportunity is taken by the second author to describe a new genus and species, Felicitomyia brundini, from the eastern Himalaya.

RISK-TAKING BY THREESPINE STICKLEBACK (GASTEROSTEUS ACULEATUS) PELVIC PHENOTYPES: DOES MORPHOLOGY PREDICT BEHAVIOUR?

Behaviour ◽  
2000 ◽  
Vol 137 (7-8) ◽  
pp. 889-906 ◽  
Author(s):  
Tamara Grand
Keyword(s):  
British Columbia ◽  
Life History ◽  
Risk Taking ◽  
Gasterosteus Aculeatus ◽  
Positive Relationship ◽  
Threespine Stickleback ◽  
Risk Exposure ◽  
The Relationship ◽  
Lateral Plates

AbstractThe relationship between risk-taking behaviour and anti-predator morphology was studied in benthic threespine stickleback fish (Gasterosteus aculeatus) from Paxton and Priest Lakes on Texada Island, British Columbia, Canada. In general, Priest Lake benthics possess complete pelvic girdles and numerous lateral plates. In contrast, Paxton Lake benthics exhibit an apparent polymorphism in anti-predator morphology; some individuals possess complete pelvic girdles while others lack them entirely. Although phenotypes tended to differ in their willingness to risk exposure to a trout predator while foraging, the predicted positive relationship between risk-taking behaviour and anti-predator morphology was not observed. While 'girdled' Paxton individuals were more willing to forage in the vicinity of the predator than 'girdleless' Paxton individuals, the more heavily armoured Priest fish were intermediate in their risk-taking behaviour. These results suggest that the relationship between risktaking behaviour and anti-predator morphology may be influenced by differences between phenotypes in predation regime and life history.

A new genus-level and two new species-level synonyms in the extinct genus Neolitochropus Lyubarsky & Perkovsky (Coleoptera: Cyclaxyridae)

Zootaxa ◽  
2020 ◽  
Vol 4894 (4) ◽  
pp. 598-599
Author(s):  
MATTHEW L. GIMME ◽  
KAROL SZAWARYN
Keyword(s):  
Life History ◽  
New Species ◽  
New Zealand ◽  
New Genus ◽  
Abundant Species ◽  
Species Level ◽  
Genus Level ◽  
The Family ◽  
Two New Species ◽  
Extinct Genus

Gimmel et al. (2019) recently treated the two fossil taxa of the beetle family Cyclaxyridae (Cucujoidea), a family that is today represented only by two species in New Zealand (Gimmel et al. 2009). Gimmel et al. (2019) synonymized two species from European amber described within the family Phalacridae (Cucujoidea), Stilbus bedovoyi Lyubarsky & Perkovsky, 2011 and Neolitochropus hoffeinsorum Lyubarsky & Perkovsky, 2016, with Neolitochropus bedovoyi (Lyubarsky & Perkovsky, 2011) becoming the valid combination. They treated a total of 13 specimens of this species from across Rovno, Bitterfeld, and Baltic amber deposits, implying a widespread and abundant species in Eocene Europe whose life history, like extant forms, was likely tied to sooty molds (Gimmel et al. 2019). 

Phenotypic Variation in Threespine Sticklebacks (Gasterosteus aculeatus) of the Chignik River System, Alaska

1969 ◽  
Vol 26 (2) ◽  
pp. 405-412 ◽  
Author(s):  
David W. Narver
Keyword(s):  
Life History ◽  
Phenotypic Variation ◽  
Gasterosteus Aculeatus ◽  
River System ◽  
Threespine Stickleback ◽  
Caudal Peduncle ◽  
Threespine Sticklebacks ◽  
History Of ◽  
Lateral Plates

Four phenotypes of the threespine stickleback, Gasterosteus aculeatus Linnaeus, were identified from the two Chignik lakes, Alaska: unplated (2–6 anterior plates); half-plated (7–15 anterior plates); fully plated (18–22 plates) lacustrine; and fully plated (18–22) estuarine. Distinctions lie in number and size of lateral plates and extent of lateral keel development on the caudal peduncle. Composition of the three lacustrine phenotypes in either lake population was similar among the years 1962–64 for both age I and age II in Black Lake but dissimilar in Chignik Lake. The Black Lake population contained a higher proportion of the unplated and half-plated phenotypes but fewer of the fully plated phenotypes than the Chignik Lake population. The life history of the estuarine phenotype is outlined. The mechanisms responsible for the maintenance of the four phenotypes in the Chignik River system have not been determined.

scholarly journals Memoirs: On some remarkable new Forms of Caryophyllaeidae from the Anglo-Egyptian Sudan, and a Revision of the Families of the Cestodaria

1923 ◽  
Vol s2-67 (267) ◽  
pp. 435-472
Author(s):  
W. N. F. WOODLAND
Keyword(s):  
Life History ◽  
New Species ◽  
New Genus ◽  
The Body ◽  
Caudal Appendage ◽  
Anterior Half ◽  
The Family ◽  
History Of

1. Four remarkable new species of Caryophyllaeidae from the Anglo-Egyptian Sudan are described, three of which (from Siluroid fishes) are referred to a new genus, Wenyonia --W. virilis, W. acuminata, and W. minuta--and the fourth (from Mormyrus caschive) to the original genus Caryophyllaeus--C. filiformis. The chief characteristics of the new genus are the situation of the sexual apertures in the anterior half of the body, and the elongated uterus. The family Caryophyllaeidae, after deletion of the genera Diporus, Monobothriuin, and Glaridacris, thus contains three genera--Caryophyllaeus, Archigetes, and Wenyonia--all of which are re-defined, with their known species. 2. Very young immature forms of Wenyonia occur in the same (Siluroid) host as the adult and are devoid of a ‘caudal’ appendage, whence it would appear that the life-history of these new forms is different from that of C. laticeps. 3. The three families of the Cestodaria--Caryophyllaeidae, Gyrocotylidae, and Amphilinidae--are re-defined. 4. The Cestodaria, after eliminating Sanguinicola (a Trematode ?), are provisionally grouped into two Orders: the Amphilinidea (with one family, the Amphilinidae) and the Paralinidea (with two families, the Caryophyllaeidae and the Gyrocotylidae), the latter being closely allied to the Bothriocephalidae. These two Orders are defined.

scholarly journals Genome characterization, prevalence and transmission mode of a novel picornavirus associated with the Threespine Stickleback (Gasterosteus aculeatus)

2018 ◽  
Author(s):  
Megan A Hahn ◽  
Nolwenn M. Dheilly
Keyword(s):  
Gasterosteus Aculeatus ◽  
Evolutionary Ecology ◽  
Rna Virus ◽  
Threespine Stickleback ◽  
Vitro Fertilization ◽  
Virus Particles ◽  
The Family ◽  
Threespine Sticklebacks ◽  
The Impact

The complete genome sequence of an RNA virus was assembled from RNA sequencing of virus particles purified from threespine stickleback intestine samples. This new virus is most closely related to the Eel Picornavirus and can be assigned to the genus Potamipivirus in the family Picornoviridae. Its unique genetic properties are sufficient to establish a new species, dubbed the Threespine Stickleback Picornavirus (TSPV). Due to their broad geographic distribution throughout the northern hemisphere and parallel adaptation to freshwater, threespine sticklebacks have become a model in evolutionary ecology. Further analysis using diagnostic PCRs revealed that TSPV is highly prevalent in both anadromous and freshwater populations of threespine sticklebacks and is transmitted vertically to offspring obtained from in vitro fertilization in laboratory settings. It is thus necessary to test the impact of TSPV on the biology of threespine sticklebacks as this widespread virus could interfere with the behavioral, physiological, or immunological studies that employ threespine sticklebacks as model system.

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