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Test

Fish Reproduction

sophie waddington 12 preguntas

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Este test tiene tipos de pregunta que se abren en el reproductor de siempre.

Preguntas del test (12)

  1. 1There are 2 methods of fish reproduction:

    - broadcast [blank_start]spawning[blank_end] = [blank_start]gametes[blank_end] are released simultaneously into the water column, this is the most common, not just fish also coral
    - [blank_start]internal[blank_end] fertilisation

    1. Aspawning
    2. Bgametes
    3. Cinternal
  2. 2[blank_start]fecundity[blank_end] = the ability to produce an abundance of offspring/new growth

    - fecundity is directly related to female body [blank_start]size[blank_end], larger individuals produce more [blank_start]eggs[blank_end]
    - egg [blank_start]size[blank_end] among fish species is quite conservative they just vary in the number of eggs they produce
    - increased fecundity with size is a huge problem for the [blank_start]fishing[blank_end] industry, as the [blank_start]larger[blank_end] individuals of the population are removed this has a dramatic effect on the number of eggs being released into the water column
    1. Afecundity
    2. Bsize
    3. Ceggs
    4. Dsize
    5. Efishing
    6. Flarger
  3. 3Fish Eggs and Plankton
    - fish eggs and larvae are massive contributors to the [blank_start]plankton[blank_end] biomass
    - [blank_start]lipid[blank_end] (fat) droplet in fish eggs aid buoyancy and are a source of nutrition throughout development
    - there is a high mortality rate in fish eggs (2-10% per day) but the high [blank_start]fecundity[blank_end] increases their chance of survival
    - fish eggs/plankton make up the diet of a lot of other
    - high mortality is okay due to large number and lack of [blank_start]parental[blank_end] care
    1. Aplankton
    2. Blipid
    3. Cfecundity
    4. Dparental
  4. 4Predation of fish larvae
    - capelin larvae experience mortality rates of more than 50% per day
    - the main cause of mortality is predation by [blank_start]zooplankton[blank_end] e.g. copepods, ctenophores, chaetognaths
    1. Azooplankton
  5. 5[blank_start]Herring[blank_end] Spawning Grounds
    - herring show localised and synchronised spawning to [blank_start]increase[blank_end] chances of fertilisation
    - usually an [blank_start]open[blank_end] water fish, herring come inshore to the kelp zone to spawn
    - they are [blank_start]benthic[blank_end] spawners (from bottom; unlike other fish)
    - eggs (1.5mm) are sticky and stick to the fronds of the [blank_start]kelp[blank_end]
    - eggs develop in 1 week
    - Pacific Herring show fecundity of about 22,300 but make up for this low number through this method
    1. AHerring
    2. Bincrease
    3. Copen
    4. Dbenthic
    5. Ekelp
  6. 6Grunion Spawning is linked to the [blank_start]lunar[blank_end] cycle so only lasts 1-3 hours every month
    - on the [blank_start]spring[blank_end] tide (highest high tide) the males and females strand themselves on the beach and release their gametes
    - they they return to the water with the next wave
    - embryos then develop in the [blank_start]sand[blank_end] until the next spring tide
    - this prevents [blank_start]predation[blank_end] by zooplankton in the plankton e.g copepods, ctenophores
    1. Alunar
    2. Bspring
    3. Csand
    4. Dpredation
  7. 7Shark Mating: internal fertilisation
    - males insert a modified [blank_start]pelvic[blank_end] fin called a [blank_start]clasper[blank_end] into a female and insert sperm
    - females are often hurt in the process and as a result have evolved [blank_start]skin[blank_end] x2 as thick!
    1. Aclasper
    2. Bpelvic
    3. Cskin
  8. 8Elasmobranch developmental mode: 3 modes
    - [blank_start]viviparity[blank_end] = bringing forth live young
    - [blank_start]ovoviviparity[blank_end] = nutrition derived from egg inside the body
    - [blank_start]ovoparity[blank_end] = laying eggs
    1. Aviviparity
    2. Bovoviviparity
    3. Covoparity
  9. 9Nest Guarding in [blank_start]Damsel[blank_end] fish (damsel in distress)
    - male damsel fish nest guard for a number of females (polygyny)
    - parental care [blank_start]stops[blank_end] once eggs have been hatched
    - mortality rates after hatching are [blank_start]high[blank_end]
    1. ADamsel
    2. Bstops
    3. Chigh
  10. 10Mouth brooding in [blank_start]male[blank_end] cardinal fish
    - young kept in mouth
    - older male cardinal fish may result to [blank_start]cannibalism[blank_end]
    1. Acannibalism
    2. Bmale

Información

Descripción
Marine Vertebrates Test sobre Fish Reproduction, creado por sophie waddington el 13/04/2018.
Idioma
English
Visitas
3
Etiquetas
marine vertebrates
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