Biol 316 Midterm BIOL 316 (fisheries) Queens Questions
With Complete Solutions
___ tend to produce better quality eggs than young females
Correct Answers BOFFFFs = big old fat fecund female fish
--- is the mediator that translates environmental cues into
morphological, physiological or behavioural changes in fish in
preparation for reproduction Correct Answers endocrine
system
2 classes of bony fish Correct Answers sarcopterygii and
actinopterygii
2 groups of cartilaginous fish Correct Answers elasmobranchs
(sharks and rays) and chimaeras (rabbitfish, ratfish,
elephantfish...)
2 main groups of jawed fish Correct Answers cartilaginous fish
and bony fish
97% of earth's waters are ___, but nearly half of all fish live in
___ Correct Answers marine, freshwater
Actinopterygii Correct Answers - ray-finned fishes
- includes Chondrostei and Neopterygii
advantages of stable isotope analyses Correct Answers - slow
turnover, info covers a large window of time
,- can be used to assess relative importance of major pathways in
food webs
- can be used to determine if two species feed similarly or
dissimilarly
- indicate components of diet actually assimilated
- good for determining trophic level at which an organism is
feeding
- good for determining spatial variations in nutrition
all jawed cartilaginous fish have these 3 things Correct Answers
jaw, paired appendages, skeleton made of cartilage
alternative reproductive strategies Correct Answers e.g. atlantic
salmon:
- some juvenile males don't go out to sea, develop mature testes
instead
- they try to fertilize eggs laid by adult females when large males
and females are spawning
anadromous= Correct Answers diadromous, most feeding and
growth takes place in sea, adults migrate to freshwater to
reproduce (e.g. salmon, sea lamprey)
another way (besides skipping the zooplanktivorous stage) to
accelerate the shift to piscivory? Correct Answers match the
timing and location of spawning with the availability of fish
prey
aquaculture Correct Answers the domestication of wild fish
stocks for human consumption
, aquatic hypoxia= Correct Answers situation where amount of
oxygen in water becomes much lower than normal conditions
(e.g. ice-covered lakes, tide pools, warm water with lots of
decaying material)
are all relationships between different organisms in a food web
equally important? Correct Answers no, removing some
weakly interacting species hardly affects the system while
removing strongly interacting species would result in massive
changes
- important to distinguish between these two situations,
especially when harvesting a fish
Are fish endothermic or ectothermic? Correct Answers
ectothermic
are hagfish techinically fish Correct Answers no they're not
even vertebrates
Beaverton-Holt Model Correct Answers Assumes juvenile
density is a limiting factor, max reproductive rate is near
recruits=0, levels off as reach carrying capacity
biological issues with aquaculture Correct Answers - sources of
feed (need to harvest wild fish to grow carnivores)
- escapees (genetic dilution of wild stocks, transfer of disease)
- habitat modification (mangroves and coastal wetlands to fish
farms, these areas previously acted as nurseries for wild stock,
flood control)
- impact of waste (uneaten food and feces can lead to nutrient
pollution)
With Complete Solutions
___ tend to produce better quality eggs than young females
Correct Answers BOFFFFs = big old fat fecund female fish
--- is the mediator that translates environmental cues into
morphological, physiological or behavioural changes in fish in
preparation for reproduction Correct Answers endocrine
system
2 classes of bony fish Correct Answers sarcopterygii and
actinopterygii
2 groups of cartilaginous fish Correct Answers elasmobranchs
(sharks and rays) and chimaeras (rabbitfish, ratfish,
elephantfish...)
2 main groups of jawed fish Correct Answers cartilaginous fish
and bony fish
97% of earth's waters are ___, but nearly half of all fish live in
___ Correct Answers marine, freshwater
Actinopterygii Correct Answers - ray-finned fishes
- includes Chondrostei and Neopterygii
advantages of stable isotope analyses Correct Answers - slow
turnover, info covers a large window of time
,- can be used to assess relative importance of major pathways in
food webs
- can be used to determine if two species feed similarly or
dissimilarly
- indicate components of diet actually assimilated
- good for determining trophic level at which an organism is
feeding
- good for determining spatial variations in nutrition
all jawed cartilaginous fish have these 3 things Correct Answers
jaw, paired appendages, skeleton made of cartilage
alternative reproductive strategies Correct Answers e.g. atlantic
salmon:
- some juvenile males don't go out to sea, develop mature testes
instead
- they try to fertilize eggs laid by adult females when large males
and females are spawning
anadromous= Correct Answers diadromous, most feeding and
growth takes place in sea, adults migrate to freshwater to
reproduce (e.g. salmon, sea lamprey)
another way (besides skipping the zooplanktivorous stage) to
accelerate the shift to piscivory? Correct Answers match the
timing and location of spawning with the availability of fish
prey
aquaculture Correct Answers the domestication of wild fish
stocks for human consumption
, aquatic hypoxia= Correct Answers situation where amount of
oxygen in water becomes much lower than normal conditions
(e.g. ice-covered lakes, tide pools, warm water with lots of
decaying material)
are all relationships between different organisms in a food web
equally important? Correct Answers no, removing some
weakly interacting species hardly affects the system while
removing strongly interacting species would result in massive
changes
- important to distinguish between these two situations,
especially when harvesting a fish
Are fish endothermic or ectothermic? Correct Answers
ectothermic
are hagfish techinically fish Correct Answers no they're not
even vertebrates
Beaverton-Holt Model Correct Answers Assumes juvenile
density is a limiting factor, max reproductive rate is near
recruits=0, levels off as reach carrying capacity
biological issues with aquaculture Correct Answers - sources of
feed (need to harvest wild fish to grow carnivores)
- escapees (genetic dilution of wild stocks, transfer of disease)
- habitat modification (mangroves and coastal wetlands to fish
farms, these areas previously acted as nurseries for wild stock,
flood control)
- impact of waste (uneaten food and feces can lead to nutrient
pollution)
