scholarly journals First record of ‘climbing’ and ‘jumping’ by juvenile Galaxias truttaceus Valenciennes, 1846 (Galaxiidae) from south-western Australia

2014 ◽  
Vol 62 (2) ◽  
pp. 175 ◽  
Author(s):  
Paul G. Close ◽  
Tom J. Ryan ◽  
David L. Morgan ◽  
Stephen J. Beatty ◽  
Craig S. Lawrence
Keyword(s):  
Western Australia ◽  
Swimming Performance ◽  
First Record ◽  
Freshwater Fishes ◽  
Low Flow ◽  
Upstream Migration ◽  
Early Life Stages ◽  
Critically Endangered Species ◽  
Juvenile Stages ◽  
Australian Freshwater

Upstream migration of juvenile stages of temperate Australian amphidromous fish typically coincides with seasonally low river discharge when hydraulic (e.g. cascades) and physical (e.g. rock bars) barriers may be common. The ability to ‘climb’ or ‘jump’ may be expected to assist in negotiating low-flow barriers; however, it is presumed to be limited to a few native Australian freshwater fishes. Juvenile stages of Galaxias truttaceus Valenciennes, 1846 were observed ‘climbing’ and ‘jumping’ to successfully negotiate a low, vertical weir wall during their upstream recruitment migrations in south-western Australia. Based on this observation, we propose initial definitions for ‘climbing’ and ‘jumping’ to describe locomotory strategies employed by fishes to negotiate obstacles that would otherwise prevent free passage by normal swimming behaviour. Greater knowledge of the climbing, jumping and swimming performance, especially for small-bodied species and early life stages, will help improve the management of instream barriers for this critically endangered species and other freshwater fishes of southern Australia.

scholarly journals Discovery of a host fish for glochidia of Velesunio angasi (Sowerby, 1867) (Bivalvia:Unionoida:Hyriidae) from the Fortescue River, Pilbara, Western Australia

2010 ◽  
Vol 58 (4) ◽  
pp. 263 ◽  
Author(s):  
Michael W. Klunzinger ◽  
David L. Morgan ◽  
Alan J. Lymbery ◽  
Brendan C. Ebner ◽  
Stephen J. Beatty ◽  
...  
Keyword(s):  
Light Microscopy ◽  
Western Australia ◽  
Freshwater Mussels ◽  
First Record ◽  
Freshwater Fishes ◽  
Host Fish ◽  
Mean Intensity ◽  
Size And Shape ◽  
Eleven Species

Freshwater fishes are the most common hosts of the glochidia (parasitic larvae) of freshwater mussels (Bivalvia: Unionoida: Unionoidea). Velesunio angasi (Sowerby, 1867) (Hyriidae), is the only known hyriid species recorded from the Fortescue River in the Pilbara region of Western Australia. Eleven species of fish (n = 516) were captured from pools of the Fortescue River in June 2010. Small, white, bladder-like cysts were observed on Neosilurus hyrtlii Steindachner, 1867, though not on any of the remaining 10 species examined. Light microscopy of sectioned cysts revealed that they contained glochidia that were of similar size and shape to those of V. angasi. Glochidia were found on 73.2% of 168 N. hyrtlii examined, with a mean intensity of 3.3 cysts per infested fish. Prevalence was significantly greater on smaller fish (P < 0.01); however, no relationship between size and intensity of infestation was observed. This represents the first record of glochidia infestation on fish from the Pilbara region.

scholarly journals First record of Pickfordiateuthis vossi Brackoniecki, 1996 (Myopsida, Loliginidae) early life stages in the central Mexican Pacific

Check List ◽  
2019 ◽  
Vol 15 (1) ◽  
pp. 87-92 ◽  
Author(s):  
Gloria Pelayo-Martínez ◽  
Roxana De Silva-Dávila ◽  
Carmen Franco-Gordo ◽  
Aramis Olivos-Ortiz
Keyword(s):  
Life Cycle ◽  
Early Life ◽  
New Record ◽  
First Record ◽  
Northwest Coast ◽  
Life Stages ◽  
Early Life Stages ◽  
Mexican Pacific ◽  
Previous Record ◽  
Juvenile Stages

The grass squid Pickfordiateuthis vossi Brakoniecki, 1996 is a dwarf species distributed along the northwest coast of Mexico. In the eastern Pacific, little is known about its distribution and life cycle. Two specimens, which are considered the smallest individuals of the genus collected to date, were caught in zooplankton trawls during 2 oceanographic cruises (January and March 1998) carried out in the central Mexican Pacific. The paralarval and juvenile stages are described and represent a new record in the area, with a range extension of 600 km southwest from the nearest previous record.

Phylogeny‐based conservation priorities for Australian freshwater fishes

2021 ◽  
Author(s):  
Amy R. Tims ◽  
John Alroy
Keyword(s):  
Freshwater Fishes ◽  
Conservation Priorities ◽  
Australian Freshwater

Behavioural responses of Australian freshwater crayfish (Cherax cainii and Cherax albidus) to exotic fish odour

2006 ◽  
Vol 54 (6) ◽  
pp. 399 ◽  
Author(s):  
S. G. Height ◽  
G. J. Whisson
Keyword(s):  
Western Australia ◽  
Predatory Fish ◽  
Behavioural Plasticity ◽  
Current Debate ◽  
Freshwater Crayfish ◽  
Indigenous Species ◽  
Exotic Fish ◽  
Behavioural Responses ◽  
Invasive Crayfish ◽  
Australian Freshwater

Exotic finfish and crayfish have been translocated into Western Australia for more than 100 years. Deliberate stocking and subsequent escape from man-made impoundments have resulted in widespread distribution of non-native yabbies (Cherax albidus) and the exotic redfin perch (Perca fluviatilis) in the State’s south-west. Both species are considered invasive and are known to compete with indigenous species for resources. The nature and degree of impact on native marron (Cherax cainii) is unclear and the subject of current debate. Other researchers have hypothesised that invasive species modify their behaviour in the presence of predators in a more rapid and advantageous manner than native species. This greater behavioural plasticity can result in displacement of indigenous species and successful colonisation of invaders. The aim of this study was to investigate behavioural responses of an indigenous crayfish (C. cainii) and an invasive crayfish (C. albidus) to odours from a native predator (Tandanus bostocki) and an exotic predatory fish (P. fluviatilis) present in Western Australia. Crayfish behaviour was observed in individual glass tanks following the addition of odours from native (T. bostocki) or exotic (P. fluviatilis) finfish predators. Marron exhibited minor behavioural modifications when presented with odours from native or exotic finfish. In contrast, the invasive yabby showed greater detection of odours, displaying significant changes in behaviour (P < 0.05). Yabbies also appeared to distinguish between food odour (commercial crayfish feed) and predator odour; however, neither marron nor yabbies displayed behaviour indicating that they could distinguish between a native or exotic fish predator. Results support the hypothesis that invasive crayfish species have a greater capacity for behavioural plasticity than non-invasive crayfish.

Effects of temperature on the fast-start swimming performance of an Australian freshwater fish

2008 ◽  
Vol 17 (1) ◽  
pp. 184-188 ◽  
Author(s):  
J. P. Lyon ◽  
T. J. Ryan ◽  
M. P. Scroggie
Keyword(s):  
Freshwater Fish ◽  
Swimming Performance ◽  
Fast Start ◽  
Effects Of Temperature ◽  
Australian Freshwater

scholarly journals Records of Jerdon's baza Aviceda jerdoni (Blyth, 1842) from eastern Nepal

2021 ◽  
Vol 5 (1) ◽  
pp. 47-50
Author(s):  
Sanjaya Raj Tamang ◽  
Amrit Kumar Poudel ◽  
Pratik Pandeya
Keyword(s):  
Endangered Species ◽  
Sea Level ◽  
First Record ◽  
Red List ◽  
Critically Endangered ◽  
Mean Sea Level ◽  
Critically Endangered Species

Jerdon's baza Aviceda jerdoni is one of the least studied raptor species in Nepal which is listed as a Critically Endangered species in the ‘Nepal's Red List of Birds’. This paper presents the records of this species during opportunistic surveys, conducted in 2018/2019 from Ilam and Jhapa districts of eastern Nepal. A total of 18 individuals were sighted during the study period with the first record of nest of the species in Nepal. The sightings were made between 70 m, the lowest global known range to 1048 m from mean sea level, and the highest altitudinal record for Nepal. Hunting and unintentional prey poisoning were identified as major threats for species in the study site.

Swimming Performance of Juveniles of Some Freshwater Fishes as Index of Transition to Nekton Mode of Life

2017 ◽  
Vol 53 (4) ◽  
pp. 36-42
Author(s):  
I. I. Abramiuk ◽  
S. A. Afanasyev
Keyword(s):  
Swimming Performance ◽  
Freshwater Fishes ◽  
Mode Of Life

Swimming performance in early life stages of three threatened Iberian Leuciscidae

2019 ◽  
Vol 23 (1) ◽  
pp. 23-29
Author(s):  
Daniel Mameri ◽  
Carla Sousa-Santos ◽  
Joana Isabel Robalo ◽  
Fátima Gil ◽  
Ana Margarida Faria
Keyword(s):  
Early Life ◽  
Swimming Performance ◽  
Life Stages ◽  
Early Life Stages

Ecology of Australian Freshwater Fishes

2013 ◽  
Vol 38 (sup1) ◽  
pp. 121-122
Author(s):  
Olaf LF Weyl
Keyword(s):  
Freshwater Fishes ◽  
Australian Freshwater

Salinity tolerances of endemic freshwater fishes of south-western Australia: implications for conservation in a biodiversity hotspot

2011 ◽  
Vol 62 (1) ◽  
pp. 91 ◽  
Author(s):  
Stephen J. Beatty ◽  
David L. Morgan ◽  
Mahmoud Rashnavadi ◽  
Alan J. Lymbery
Keyword(s):  
Western Australia ◽  
Large Range ◽  
Fish Fauna ◽  
Freshwater Fishes ◽  
Main Channel ◽  
Restricted Range ◽  
Fresh Groundwater ◽  
Secondary Salinisation ◽  
Freshwater Fish Fauna ◽  
Dispersal Capability

Secondary salinisation represents an important threat to terrestrial and aquatic habitats throughout the world. In south-western Australia, widespread salinisation of waterways has caused large range reductions in the highly endemic freshwater fish fauna. We hypothesised that differences in the distributions of three fish species within the salinised Blackwood River would be related to their salinity tolerances. Galaxias occidentalis was widespread throughout the catchment, whereas Nannoperca vittata was restricted to the main channel and freshwater tributaries of the lower catchment, and Nannatherina balstoni was restricted to those tributaries and a perennial section of the main channel that received a considerable amount of fresh groundwater. Acute salinity tolerances (Effect Concentrations) of G. occidentalis and N. vittata were similar (EC50 ∼14.6 g L–1), but significantly greater than that of N. balstoni (EC50 ∼8.2 g L–1). The greater geographical range of G. occidentalis, compared with N. vittata, may be a consequence of the dispersal capability of the former species, and the lower salinity tolerance of N. balstoni contributes to its highly restricted range. The findings demonstrate that secondary salinisation has greatly impacted these freshwater fishes, and fresh groundwater refuges, predicted to decrease due to reduced rainfall, appear crucial in maintaining remnant populations.

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